Plaintiff-Appellant Albert Woods appeals from the order of the United States District Court for the Northern District of Illinois, Eastern Division, granting summary judgment to defendants-appellees MakowsM, Alanis, and the City of Chicago. For the reasons set forth below, we affirm.
*983 BACKGROUND
Albert Woods was arrested at his place of employment for misdemeanor assault. After the charges against him were dropped, Woods filed an action under 42 U.S.C. § 1983 against the City of Chicago and Chicago police officers Makowski and Alanis, asserting violations of his Fourth Amendment rights. In his complaint, Woods contended that the officers acted unreasonably in arresting him without a warrant for misdemeanor assault one day after Gabriel Flores (the putative assault victim) signed a criminal complaint against him. He also asserted that the officers acted in accordance with a policy of the City of Chicago authorizing its police officers to make a full custodial arrest for a misdemeanor that did not involve a breach of the peace and that had not been committed in the officers’ presence. The officers moved to dismiss Woods’ complaint against them under Fed.R.Civ.P. 12(b)(6), arguing that Flores’ report of the assault to the police (which Woods had referenced in his complaint) gave them probable cause to arrest Woods, and that arrests supported by probable cause are reasonable under the Fourth Amendment subject to a “rare exception” not applicable in Woods’ case. The City moved to dismiss on similar grounds, arguing that even if Woods could show that the City had a municipal “policy” authorizing warrantless arrests for misdemeanors not involving a breach of the peace and not committed in an officer’s presence, such a policy would not be unconstitutional as applied to Woods’ arrest, which was authorized by state law and based on probable cause.
Woods filed a memorandum opposing the City’s motion to dismiss, arguing that his complaint did not demonstrate that the officers had probable cause to arrest him. According to Woods, the complaint merely asserted that a citizen had walked into a Chicago police station on July 21, 1997 and stated that on July 18, 1997 he had been “verbally assaulted” by Woods. Woods noted that the complaint did not allege that this information was communicated to the arresting officers. Furthermore, he contended that even if the arresting officers had been aware of the citizen’s complaint, it did not provide them with probable cause to arrest because “verbal assault” is not an offense under Illinois law.
The City and the individual defendants jointly filed a reply. Attached to the reply were various exhibits, including a copy of Flores’ verified misdemeanor complaint and a copy of the arresting officer’s report of Woods’ arrest. The verified misdemeanor complaint (signed under oath by Flores) charged Woods with aggravated assault, and stated that “on or about 18 July ’97 ... [Woods] while using a deadly weapon, length of a lead pipe, did without lawful authority produce weapon and came at victim yelling I’m going to kill you, which placed Gabriel Flores in reasonable apprehension of receiving a battery.” The arrest report essentially repeated this account of the incident, stating that,
[t]he above subject arrested for [aggravated assault. On 18 July 97 victim went to truck leasing company where offender is employed to gas up a leased truck. At that time offender got into a verbal arguement [sic] with victim and produced a lead pipe and told victim I’m going to kill you. When offender started to approach victim, victim got into his truck and fled the scene. R/O’s interviewed victim who signed compiainats [sic], R/O’s went to offender’s place of employment, placed subject under arrest and advised subject of his rights which he stated he understood.
The arrest report was signed under the statement “I do solemnly, sincerely, and truly declare and affirm that the facts stated herein are accurate to the best of my knowledge.”
Woods moved to exclude these exhibits on grounds that such evidentiary material could not be considered during a motion to dismiss. He argued that the court could not consider the exhibits unless it first *984 converted the motion to dismiss into a motion for summary judgment under Fed. R.Civ.P. 12(b), and that such a conversion would be inappropriate in this case. Finally, he argued that unless the court excluded these materials, it must give Woods an opportunity to respond, and that in order to do so Woods must be allowed to depose the officers who signed the arrest report “about the report and about the circumstances of the signing of the complaint” as well as “the citizen upon whose alleged complaint plaintiff was arrested.” The court granted Woods’ motion to exclude the exhibits. Subsequently, the court granted the City’s motion to dismiss on the ground that Woods had failed to state a municipal policy, and it gave Woods leave to file an amended complaint.
Woods filed an amended complaint which restated his earlier claim that Flores claimed to have been “verbally assaulted” by Woods, and which explicitly stated that such a claim did not supply the officers with probable cause to arrest Woods. The amended complaint also reasserted that the officers violated Woods’ Fourth Amendment rights by arresting him without a warrant for a misdemeanor offense not committed in their presence and not involving a breach of the peace pursuant to a municipal policy authorizing such arrests. Again, the defendants moved to dismiss, arguing that Flores’ complaint established probable cause. 1 Woods opposed the defendants’ motion, again contending that even if the officers had been aware of Flores’ complaint (which his complaint did not allege), that complaint did not provide probable cause to arrest because “verbal assault” is not an offense under Illinois law, which defines assault as “conduct which places another in reasonable apprehension of receiving a battery.” 720 ILCS 5/12-1.
The court then converted the defendants’ motion to dismiss into a motion for summary judgment, noting that the defendants had attached “pertinent eviden-tiary material” to their reply to Woods’ memorandum in opposition to the motion to dismiss Woods’ original complaint. Addressing Woods’ claim that Flores had complained merely of a “verbal assault,” the court quoted the arrest report’s account of Flores’ complaint, which stated that Woods had brandished a lead pipe during the altercation and which specifically referenced Illinois’ aggravated assault statute. The court stated that “the misdemeanor complaint, filed by Gabriel Flores, further indicates that Woods committed an aggravated assault with a deadly weapon while threatening to kill Flores,” and that “this evidence indicates that the arresting officers arrested Woods based on information that Woods committed an aggravated assault.” In ordering Woods to respond to the motion for summary judgment, the court admonished him to “pay particular attention” to Fed. R.Civ.P. 11(b), and stated that: ‘Woods’ characterization of the altercation as a ‘verbal assault’ is grossly misleading. Further, his argument that ‘nowhere in the complaint does plaintiff allege that any police officer had been informed that plaintiff had engaged in conduct which placed another in reasonable apprehension of receiving a battery’ ... ignores facts and logic in a blatant attempt to survive the motion [to] dismiss.”
In Woods’ response, he argued that the arrest report and the misdemeanor complaint could not be considered on a motion for summary judgment because: (1) the defendants had not laid any foundation for their admission, (for example, they did not show the date or time of the alleged interview between Flores and the arresting officers in the arrest report); (2) they were unauthenticated; and (3) the police report *985 did not fully and fairly set out the facts. In support of the latter argument, Woods attached a Chicago Police Case Report to his response, which he relied upon for its accuracy. The case report stated that “R/O interviewed the victim who related to R/O that ... offender ... grabbed lead pipe — told victim to get out of the truck and said ‘If I get fired over this, I’m going to kill you.’ Victim left thinking offender overreacting. Today’s date 21 Dec. ’97 offender told two of victim’s co-workers (Kenny and Mike) that he was going to ‘get’ victim because victim filed report. Victim given victim information sheet. R/O advised warrant.” Woods argued that the case report demonstrated that the police lacked probable cause to arrest him because it showed that Flores waited three days to report the incident and told the police that he left thinking Woods was “overreacting,” and because Flores’ account of the incident showed only that Woods had “verbally assaulted” Flores, not that he had placed Flores in reasonable apprehension of receiving a battery. Woods also noted that the police had no documentation showing that they investigated Flores’ complaint or made any effort to corroborate it (e.g. by speaking to Flores’ supervisor or to either of the two eoworkers who allegedly heard Woods’ renewed threat to “get” Flores.) Woods asked the district court to vacate its order converting the motion to dismiss into a motion for summary judgment, and in the alternative, to postpone ruling on the motion until Woods had a chance to depose Flores and the officers who signed and prepared the arrest report.
In ruling on the summary judgment motion, the district court found that it could properly consider the police report and the misdemeanor complaint. Responding to Woods’ objection that the documents were not authenticated, the court held that the documents were “credible and trustworthy” because they were sworn to under oath by the officers and by Flores, and because they were business records kept by the police department. Additionally, the court found that Woods had admitted to the accuracy of the complaint and the arrest report by attaching and relying on the case report, which corroborated the account given by the complaint and the arrest report. The court also noted that it was examining the records “not for their truth, but for what the officers knew when they arrested Woods.”
Upon considering the exhibits, the court concluded that they showed that the officers had arrested Woods believing that he had threatened to kill Flores with a lead pipe, and that this alone established probable cause. In response to Woods’ discovery request, the court noted that it had given Woods the opportunity to show why it should not accept the information in the complaint and the arrest report as credible, and that he had failed to do so (indeed, he had even corroborated the documents by submitting the case report). Moreover, the court found that Woods had offered absolutely no evidence that the documents were “fraudulent, signed by mistake, or even inaccurate,” nor had he even denied that he had threatened to kill Flores while approaching him with a lead pipe. Under the circumstances, the court found that depositions would be a waste of time, and it granted summary judgment for the defendants without allowing Woods to depose Flores or the officers who signed the arrest report. This appeal followed.
DISCUSSION
I. Procedural Issues
Woods argues that, in deciding the converted motion for summary judgment, the district court improperly considered the verified misdemeanor complaint and the arrest report. He also argues that the district court abused its discretion in ruling on the motion without allowing him to depose Flores and the officers who prepared and signed the arrest report.
A district court may properly grant summary judgment when “the record
*986
shows that there is no genuine issue as to any material fact and that the moving party is entitled to judgment as a matter of law.”
Whetstine v. Gates Rubber Co.,
We review a district court’s grant of summary judgment de novo, drawing all reasonable inferences from the record in the light most favorable to the nonmovant.
As a preliminary matter, we note that the court did nothing improper in converting the defendants’ motion to dismiss into a motion for summary judgment. Under Fed.R.Civ.P. 12(b), a district court must make such a conversion when matters outside of the complaint are presented and not excluded by the court. Here, the district court initially granted Woods’ motion to strike the defendants’ exhibits, and ruled on the initial motion to dismiss without considering the exhibits or anything outside of the pleadings. Then, after Woods filed an amended complaint and the defendants moved again to dismiss, the court reconsidered the previously stricken exhibits and treated the defendants’ new motion to dismiss as a motion for summary judgment. Woods cites no cases that suggest that a district court may not consider previously stricken exhibits in ruling on a converted motion for summary judgment, and we find that the district court acted properly in doing so here.
However, Woods argues that the district court erred in considering the arrest report and the misdemeanor complaint in deciding the summary judgment motion because the reports contained inadmissible hearsay, and because the documents were not “affidavits” under Fed.R.Civ.P. 56(e) and 28 U.S.C. § 1746. He also argues that the district court abused its discretion in ruling on the summary judgment motion before giving him leave to depose Flores and the officers who signed and prepared the arrest report. We address these arguments in turn.
A. Woods ’ Hearsay Argument
Woods argues that the arrest report and the misdemeanor complaint contained inadmissible hearsay, and therefore could not properly be considered on a motion for summary judgment. The district court found that the information in these documents was credible and trustworthy under Fed.R.Evid. 803(6) because they were sworn to under oath by the officers and by Flores, and because they were business records kept by the police department. Woods concedes that portions of police reports that contain information prepared by the business are admissible as business records. For example, Woods suggests that a properly authenticated police report would be admissible to show the date and time of the arrest and the date and time that the arrestee was released on bond. However, Woods notes that “the business records exception does not embrace statements contained within a business record that were made by one who is
not
a part of the business if the embraced statements are offered for their truth.”
United States v. Vigneau,
While we agree fully with this principle of law, we find that it is not implicated in this case and is of no help to Woods. As the district court noted, the defendants offered the statements in the arrest report and the verified criminal complaint describing the details of the alleged altercation- between Woods and Flores not for their truth, but to show the effect that the statements had on the officers. Because the officers asserted the defense of qualified immunity, Woods had
*987
the burden at trial to prove that the police lacked probable cause to arrest him.
See Sorenson v. Ferrie,
B. Woods’ “affidavit” argument
Woods also argues that the district court should not have considered the arrest report and the misdemeanor complaint because they did not qualify as admissible “affidavits” under 28 U.S.C. § 1746 and Fed.R.Civ.P. 56(e). Rule 56(e) authorizes parties to submit affidavits supporting or opposing a motion for summary judgment, but it specifically mandates that such affidavits “shall be made on personal knowledge, shall set forth such facts as would be admissible in evidence, and shall show affirmatively that the affiant is competent to testify to the matters stated therein.” Moreover, 28 U.S.C. § 1746 provides, in relevant part, that “[wjherever, under any law of the United States or under any rule ... made pursuant to law, any matter is required or permitted to be supported ... by ... affidavit, such matter may, with like force and effect, be supported ... by the unsworn declaration, certificate, verification, or statement, in writing of such person which is subscribed by him, as true under penalty of perjury ...” (emphasis added). Woods contends that the misdemeanor complaint and the arrest report were not “affidavits” as contemplated by 28 U.S.C. § 1746 because, while they were purportedly sworn by Flores and officer Makowski (respectively), neither document contained the “penalty of perjury” language as required by that section. Moreover, Woods maintains that even if officer Makowski’s signed declaration on the arrest report were sufficient to transform that document into an “affidavit,” the report would still be inadmissible under Fed.R.Civ.P. 56(e) because it contained statements made by Flores regarding matters not within Makowski’s personal knowledge.
Woods’ arguments are unpersuasive. First, while Fed.R.Civ.P. 56(e) allows a party to submit affidavits in support of its summary judgment motion, it does not
require
that all supporting material be submitted in affidavit form.
See
Fed.R.Civ.P. 56(b) (permitting a party to
*988
move for summary judgment “with or without supporting affidavits”);
Celotex,
The district court found the documents admissible as a business record under Fed.R.Evid. 803(6). To be admissible as a business record, a document must have sufficient indicia of trustworthiness to be considered reliable.
See Saks Int'l Inc. v. M/V “Export Champion,”
Woods attached a Chicago Police Case Report to his response to the defendants’ motion for summary judgment, and he relied on the case report for its accuracy both in his original response before the district court and in his appellate brief presented to this Court. The case report recapitulated Flores’ account of the altercation as presented in the arrest report and the misdemeanor complaint in each of its essential details. By submitting and relying upon the case report, Woods conceded the accuracy of the documents that the defendants sought to introduce. This situation is strikingly similar to the situation that the First Circuit confronted in
Cerqueira v. Cerqueira,
We find this reasoning persuasive and applicable to the facts of this case. By submitting the case report and relying on it, Woods has conceded that Flores made out a complaint against him to the Chicago Police, and that in that complaint Flores alleged that Woods had threatened to kill him while wielding a lead pipe. Since these are exactly the facts that the defendants sought to prove through the arrest report and the misdemeanor complaint, we conclude that Woods cannot reasonably question the reliability of those documents. Requiring authenticating affidavits in this case would be an empty formality, and the district court did not abuse its discretion when it considered the documents without such affidavits.
Moreover, even were we to hold that the district court erred in considering the arrest report and misdemeanor complaint absent a certifying affidavit or some other traditional method of authentication, such an error would be harmless in this case. Rule 56(c) provides that summary judgment shall be granted if, among other documents, “[the] admissions on file ... show that there is no genuine issue as to any material fact and that the moving party is entitled to a judgment as a matter of law.” An “admission” includes “anything which is in practical fact an admission” Cer
queira,
C. Woods’ discovery request
Woods also argues that the district court “applied an erroneous legal standard” in refusing to permit him to depose Flores and the arresting officers before ruling on the defendants’ summary judgment motion. Citing
Illinois State Employees Union v. Lewis,
A district court’s decision to consider a defendant’s motion for summary judgment before allowing the plaintiff to depose certain witness is a discovery matter which we review for abuse of discretion.
Doty v. Illinois Central R.R. Co.,
Further, even if we were to waive Rule 56(f)’s affidavit requirement in this case, we would still find that the district court did not abuse its discretion in ruling on the motion before granting Woods leave to depose Flores and the arresting officers. Woods offered virtually nothing to demonstrate why the depositions that he sought were likely to generate any genuine issue of material fact. Woods never denied that Flores complained to the Chicago police that Woods had approached him with a lead pipe while threatening to kill him (indeed, his submission of and reliance upon the case report precluded him from denying this).
2
This admission alone would be enough to establish that the arresting officers had probable cause to arrest Woods (thereby entitling the officers to summary judgment on Woods’ § 1983 claims), absent some evidence showing that it should have been apparent to the officers that Flores was incredible as a matter of law and that the officers acted unreasonably in relying on his complaint. Woods never put forward any such evi
*991
dence, nor did he explain why discovery was likely to unearth it. Instead, Woods merely pointed to a sentence in the case report which indicated that Flores told the police that he had left the scene of the altercation with Woods thinking that Woods was “overreacting,” suggesting that this establishes that the officers should not have relied on Flores’ account of the incident when arresting Woods.
3
However, Flores’ comment that he thought that Woods was “overreacting” is completely irrelevant to the material facts that Woods needed to contest to defeat summary judgment; it tends to show neither that Flores did not report Woods’ assault to the police, nor that Flores’ account of the assault was in any way incredible. At best it shows merely that Flores thought that Woods was “overreacting” when he assaulted Flores, not that Flores was overreacting by reporting a crime to the police. Thus, based upon the facts that Woods presented to the district court, any claim that Flores was incredible as a matter of law and that the officers should not have relied upon his complaint would have been pure speculation. This is far too slender a reed upon which to hang a discovery request.
See generally United States v. All Assets and Equip. of West Side Bldg. Corp.,
Indeed, under the circumstances of this case, we would most likely affirm even if the district court had converted the defendants’ motion to dismiss into a motion for summary judgment and granted the motion without giving Woods any notice of the conversion or any opportunity to respond to the summary judgment motion. While the conversion of a 12(b)(6) motion into a summary judgment motion
“should
be accompanied by prior notice and ‘a reasonable opportunity to establish the existence of material controverted facts,’ ” the failure to afford such procedure will not necessarily mandate reversal unless “the record discloses the existence of unresolved material fact issues,” or “the parties represent that they would have submitted specific controverted material factual issues to the trial court if they had been given the opportunity.”
Milwaukee Typographical Union No. 23 v. Newspapers, Inc.,
II. Fourth Amendment Issue
Woods argues that his warrantless arrest for misdemeanor assault was unconstitutional because the alleged assault did not involve a breach of the peace and did not occur in the presence of the arresting officers. Woods notes that the Supreme Court has recently stated that “[i]n determining whether a particular governmental action violates [the Fourth Amendment], we inquire first whether the action was regarded as an unlawful search or seizure under the common law when the Amendment was framed.”
Wyoming v. Houghton,
The Supreme Court has never held that a police ■ officer violates the Fourth Amendment merely by arresting someone without a warrant for a misdemeanor offense which did not occur in the officer’s presence and/or did not involve a breach of the peace. Rather, when determining the constitutionality of a warrantless arrest for a criminal offense, the Court has repeatedly focused its inquiry on the existence of probable cause for the arrest.
See, e.g., Gerstein v. Pugh,
However, Woods argues that the historical analysis employed by the Court in
Houghton
changed the traditional Fourth Amendment inquiry and imposed a warrant requirement for all routine misdemeanor arrests unless the misdemeanor is committed in the presence of the arresting officer and involved a breach of the peace. Unfortunately for Woods, however,
Houghton
did not constitutionalize the common law rules regarding misdemeanor arrests, nor did it even address the reasonableness of an arrest under the Fourth Amendment.
Houghton
addressed the reasonableness of a search, not of a seizure of the person, and it held merely that “police officers with probable cause to search a car may inspect passengers’ belongings found in the car that are capable of concealing the object of the search.”
Moreover, in a case that was decided after both
Hodari
and
Wilson,
the Court strongly and unequivocally affirmed its traditional view that, absent certain extraordinary circumstances, a seizure is reasonable under the Fourth Amendment when it is based upon probable cause regardless of the severity of the offense involved.
See Whren v. United States,
In addition, while we have never decided whether the Fourth Amendment incorporates the common law “in the presence” rule for misdemeanor arrests,
6
we have held that other aspects of the common law standards of misdemeanor arrests are not part of the Fourth Amendment’s prohibition of “unreasonable” searches and seizures. In
Ricci v. Arlington Heights, Illinois,
the plaintiff brought a § 1983 action against the Village of Arlington Heights and the police officers who had arrested him, arguing that a full custodial arrest for the fine-only misdemeanor offense of operating a business without a license violated the Fourth Amendment.
See
Moreover, several of our sister circuits have squarely addressed Woods’ argument, and they have uniformly held or stated that the common law “in the presence” rule is not part of the Fourth Amendment.
See Vargas-Badillo v. Diaz-Torres,
Therefore, given the weight of Supreme Court authority on this issue, the overwhelming consensus of the circuits, and our similar holding in Ricci, we reject Woods’ invitation to constitutionalize the framing-era common law of misdemeanor arrests and to overturn any Illinois state or municipal laws which abrogate it.
However, while the Fourth Amendment does not require a warrant for a misdemeanor arrest like the one effected here, it does require that all warrantless arrests be “reasonable.”
Payton,
Probable cause has been defined as “facts and circumstances ‘sufficient to warrant a prudent man in believing that the [suspect] had committed or was committing an offense.’ ”
Gerstein,
Applying this standard, we have consistently held that an identification or a report from a single, credible victim or eyewitness can provide the basis for probable cause.
See Tangwall v. Stuckey,
*997
Woods also asserts that there is no documentation showing that the officers attempted to corroborate Flores’ complaint in any way, for example by speaking with Flores’ supervisor, his coworkers, or the leasing company about his complaint. However, police officers have no constitutional obligation to conduct any further investigation before making an arrest if they have received information from a reasonably credible victim or eyewitness sufficient to supply probable cause.
See Gramenos,
In an effort to call the credibility of Flores’ complaint into question, Woods notes that Flores made out the complaint three days after the alleged assault occurred. He also points to the case report, which, in reporting Flores’ description of the assault, states that Flores told the officers that he left the altercation thinking that Woods was “overreacting.” As we have already noted, however, the case report submitted by Woods indicated that Flores told the police that Woods had renewed his threats against Flores through two of Flores’ coworkers on the very day that Flores made out his complaint. This amounts to an apparently credible explanation for why Flores reported the offense when he did, and Woods offers absolutely nothing either to rebut this explanation or to undermine its credibility. Moreover, the bare fact that Flores left the scene of the altercation thinking that Woods was overreacting does not support any reason able inference that Flores did not take Woods’ threats seriously, nor does it in any way tend to diminish the credibility of Flores’ account of the incident. Finally, even if these facts did somehow diminish the credibility of the complaint that Flores made to the police, they certainly would not render it dubious enough to require the police to conduct a further investigation before arresting Woods (that is, they would not render his report incredible as a matter of law). We have found probable cause to arrest based upon uncorroborated citizen complaints which were far more questionable than was Flores’ complaint.
See Spiegel,
CONCLUSION
For the foregoing reasons, the judgment of the district court is AFFIRMED.
Notes
. The defendants also asserted the defense of qualified immunity and argued that Woods failed to establish a causal connection between the alleged municipal policy and his claimed injury. However, the district court did not address these issues, and they are not at issue in this appeal.
. Woods did contend that there was no evidence that Flores' complaint was communicated to the particular officers who arrested him, but given that the case report opened its narration of Flores' complaint with the statement that "R/O interviewed victim who related to R/O that .... " this argument is at worse disingenuous, and is at best pure sophistry.
. Woods also pointed to Flores’ delay in reporting the incident as a possible ground for the police to doubt his credibility. However, as the case report indicates, Flores provided the police with a credible explanation for the delay — namely, the renewed threat that Woods had communicated to Flores' co-workers on the day that he reported the incident. Woods does not deny that Flores gave this explanation, nor does he suggest why it might have been incredible.
. In
Maryland v. Macon,
which was decided five years after
Payton,
the Court expressly reserved the question of whether the Fourth Amendment prohibits a warrantless arrest outside of the home for the state law misdemeanor of distribution of obscene materials.
See
. Furthermore, even after
Houghton,
courts have continued to apply the traditional "probable cause” standard that was reaffirmed in
Whren
in determining the reasonableness of an arrest.
See, e.g., United States v. Moore,
. In
Gramenos v. Jewel Cos., Inc.,
we reserved the question of whether a state statute abrogating the common law "in the presence” rule for misdemeanor arrests "without putting equivalent guarantees of reasonable conduct in its place” comports with the Fourth Amendment.
.As Woods notes, in Ricci we held that the plaintiff had waived any argument under the warrant clause. See id. at 292.
. Indeed, most of these courts upheld the constitutionality of the warrantless misdemeanor arrests at issue even though the arrests violated the relevant state law which had incorporated some variant of the common law "in the presence” rule. Since Illinois law authorizes misdemeanor arrests regardless of whether the offense occurred in the presence of the arresting officer, Woods' claim of a Fourth Amendment violation seems even weaker than the similar claims rejected by many of our sister circuits.
