Dеfendant Michael L. Biglow’s contacts with a major drug dealer, Tyrone Andrews, led the Government to suspect Defendant was also engaged in drug trafficking. Based on the Government’s affidavit, which described investigators’ surveillance activities and information gleaned from confidential informants, a United States Magistrate Judge issued a warrant to search Defendant’s home for evidence related to his alleged drug dealing activities. Authorities’ search of Defendant’s residence located $769.11 in United States currency, a scale, packaging material, firearms, ammunition, drugs, and drug paraphernalia.
*1275
Subsequently, a grand jury charged Defendant with (1) possessing cocaine, in violation of 21 U.S.C. § 841(a)(1); (2) possessing cocaine with the intent to distribute, in violation of 21 U.S.C. § 841(a)(1); (3) conspiring to distribute cocaine, in violation of 21 U.S.C. §§ 841(a)(1) & 846; (4) using a communication facility to facilitate a felony, in violation of 21 U.S.C. § 843(b); and (5) unlawfully possessing two firearms, in violation of 18 U.S.C. § 922(g)(1). Defendant moved to suppress the evidence found in his home, arguing .that authorities lacked probable cause to search his residence. In response, the Government defended the magistrate judge’s probable-cause determination and, in the alternative, suggested the good-faith exception established in
United States v. Leon,
The district court considered the matter and concluded the Government’s affidavit failed to establish the probable cause necessary to search Defendant’s home. Because it viewed the Government’s evidence as utterly failing to establish (1) that Defendant was engaged in selling drugs to others and (2) the required nexus between Defendant’s drug-related activities and his residence, the district court also ruled that the good-faith exception did not apply. Consequently, the district court suppressed the evidence found in Defendant’s home.
See United States v. Cunningham,
I.
Probable cause must support the warrant authorizing the Government’s search of Defendant’s residence.
See
U.S. Const, amend. IV. (stating “no warrants shall issue, but upon probable cause”). Indeed, the “physical entry of the home is the chief evil against which the wording of the Fourth Amendment is directed.”
United States v. U.S. Dist. Court,
A.
Special Agent Greg Heiert of the United States Bureau of Alcohol, Tobacco, Firearms and Explosives executed the Government’s affidavit. The affidavit describes a series of revelations by confidential informants related to a major supplier of cocaine in Wichita, Kansas known as “Roni.” These confidential sources revealed that “Roni” (1) supplied local gang members with large amounts of cocaine, (2) usually sold cocaine in amounts ranging from a half to a whole kilogram, (3) was considered a “big fish” who purchased cocaine imported from Mexico, (4) regularly obtained around ten kilograms of cocaine a week, and (5) owned a stash house near the intersection of Mt. Vernon and Oliver. Through additional personal information provided by • informants and one photo identification, authorities: learned that “Roni’s” true name was Tyrone Andrews. 1
*1276 Tyrone Andrews worked at an aerosystems company. Real estate records revealed that he owned six properties in the Wichita area. One of these properties, a home on South Ridgewood (Ridgewood), was located only a half mile east of the intersection of Mt. Vernon and Oliver. Based on the tip they had received regarding the location of Andrews’ stash house, authorities began periodic surveillance of the Ridgewood residence in May 2007. Investigators observed Andrews entering the house either after work or on the weekends. He never stayed for long and subsequently made stops at various residences in the Wichita area.
In late June 2007, officials arranged for a confidential source to make two controlled drug buys from Andrews. Detectives contacted Andrews by telephone and asked him to supply the informant with cocaine. Subsequently, Andrews stopped at the Ridgewood house for a few minutеs, drove to the confidential informant’s location, and sold him cocaine. Authorities arranged a similar drug buy four days later, while Andrews was at his Ridgewood residence. After the purchase was arranged, Andrews again drove to the confidential source’s location and sold him cocaine.
Authorities witnessed Defendant Bi-glow’s first interaction with Andrews approximately two weeks later. Shortly after Andrews appeared at his Ridgewood address, Defendant arrived at the house in a silver Volvo. He entered the residence carrying a black briefcase, remained inside for apрroximately half an hour, and then left carrying the briefcase. Trailing investigators orchestrated a stop of Defendant’s vehicle, for an observed traffic violation, near the intersection of Kellogg and Rock Road. The detaining officer observed the black briefcase on the front passenger seat of the vehicle, issued Defendant a traffic citation, and sent him on his way. Approximately seventeen days later, a confidential source reported that Andrews was concerned authorities were monitoring his activities because a customer to whom hе had sold two kilograms of cocaine had recently been followed by police and stopped in the area of Kellogg and Rock Road.
Based on the evidence gleaned from their ongoing investigation, officials received authorization to wiretap two phone numbers belonging to Andrews. Monitoring of these lines began on September 6, 2007. At the same time, investigators stepped up their surveillance of Andrews. They discovered that Andrews normally left work around 2:30 pm, arriving at the Ridgewood property by 3:00 pm. Thereafter, he would receive phone calls from individuals ordering varying amounts of drugs. Andrews would then go on “runs” to deliver these orders to his customers’ homes.
Over a twelve-day period beginning on September 10th and ending on September 21st, the Government’s wiretaps revealed a series of seven phone calls between Andrews and a male caller using a phone number belonging to Defendant. During the first call, the caller asked Andrews “how we lookin?” When' Andrews inquired as to who was calling, the caller identified himself as “Big.” Andrews stated that the “other people, they said today but they ain’t called me” and the caller indicated he would call Andrews baсk. The next day, the caller asked if he could meet Andrews either that day or the next. Andrews said it would be tomorrow and the caller indicated he would call after Andrews returned from work.
*1277 This third call took place as planned. Andrews stated that he would need to talk to his people before the two met, indicated that “Fat Boy” had called, and explained that he needed to contact him. After he spoke with “Fat Boy,” Andrews suggested he might have to “go mess with [his] regular people.” Investigators learned that “Fat Boy” is a Hispanic male named Jose Pizana, who supplied Andrews with sеveral kilograms of cocaine. The next day the caller again rang Andrews and asked if his “boy [had] come through.” Andrews responded in the affirmative and the caller asked, “How many points is that?,” to which Andrews replied “one-nine.” The caller asked Andrews to repeat himself. Once Andrews had done so, the caller responded “okay, uh-two” and arranged to call Andrews back.
The next morning Andrews contacted the caller. The caller indicated he was about to go to work but he would “take it with” him. To this Andrews responded, “Alright, just call me.” Approximately an hour later, the caller cоntacted Andrews, stated that he was at work, and asked if anything was about to come through. Andrews indicated that it would be in the next thirty to forty minutes. Surveillance units proceeded to follow Andrews to a parking lot outside the shopping center where Defendant Biglow worked as a security guard. Investigators witnessed Defendant meet with Andrews, but their view of this rendezvous was partially obstructed by another vehicle.
One week later, the caller again contacted Andrews and asked, “How we lookin’ man?” Andrews replied that he had not heard from “Fat Boy,” which prompted the caller to question whеther Andrews had heard from “the high boy.” Andrews explained that “the high boy” “only had them other ones left and I got them last night.” The caller asked Andrews what he was “lettin’ it go for?” Andrews explained to him that he could not have “it” because “it” was already sold. Subsequently, the caller expressed frustration that Fat Boy had not called Andrews back and inquired whether Andrews’ “high people [were] coming any time soon.” Andrews stated that it would be a week. Over a period of several months, authorities observed a Hispanic male carrying a brown bag into the Ridgewood house, whom they believed to be Andrews’ “high dollаr” source.
One day after the final monitored call between Andrews and the male caller, investigators witnessed Andrews leaving his Ridgewood residence with a black bag in his car. Police stopped Andrews car, but when the officers attempted to get Andrews to exit the vehicle he sped away. While in pursuit, officers witnessed Andrews throw a black bag out his car window. They stopped to recover the bag and found a large quantity of cocaine. Authorities later took Andrews into custody.
Based on the forgoing evidence, a United States Magistrate Judge found probable cause existed to search Defendant Bi-glow’s residence for (1) records related to drug distribution, (2) financial records and receipts, (3) U.S. currency and financial instruments, (4) address and telephone books, (5) communications devices, recordings, and bills, and (6) photographs. In authorizing a search for these items, the magistrate judge credited Special Agent Heiert’s observation, in his affidavit, that in his training and experience people frequently maintain financial records and work-related documents at home, and that those involved in the sale and use of illegal substances commonly pоssess U.S. currency and customer contact information in their place of residence.
Authorities uncovered cocaine residue in a clear plastic bag and a firearm in Defendant’s home. The Government subse *1278 quently obtained a second warrant to search Defendant’s residence for drugs and drug paraphernalia. As the propriety of the second search warrant depends entirely on that of the first, we address only the original warrant in this appeal.
B.
In granting Defendant’s motion to suppress, the district court identified two main deficiencies in the Government’s probable-cause affidavit. First, the district court noted that our precedents require a nexus between suspected criminal activity and the place to be searched.
See United States v. Corral-Corral,
Second, the district court recognized that an affiant officer’s statement that drug dealers often keep records in their homes, in conjunction with evidence that an individual is a drug dealer, may establish probable cause to search that person’s home.
See United States v. One Hundred Forty-Nine Thousand Four Hundred Forty-Two and 43/100 Dollars ($149,442.43) in U.S. Currency,
The district court also rejected the Government’s argument that the good-faith exception should apply. Based on its conclusion that the Government’s affidavit failed to establish a nexus between Defendant’s alleged criminal activities and his residence, the court ruled that the Government’s evidence was “so lacking in indicia of probable cause as to render official belief in its existencе entirely unreasonable.”
Leon,
II.
Before we consider the sufficiency of the Government’s affidavit, we must address a potential conflict in our precedents regarding the Fourth’s Amendment’s nexus requirement. All agree that a nexus must exist between suspected criminal activity and the place to be searched, but the parties dispute the strength of the evidence that must link the two.
2
On one hand, Defendant cites our decision in
United States v. Rowland,
We recognize that our cases in this area are open to conflicting interpretations, but we believe the application of basic Fourth Amendment principles avoids such internal strife. The “touchstone” of the Fourth Amendment is “reasonableness.”
Samson v. California,
While the nexus requirement — like probable cause itself — is not reducible “to a neаt set of legal rules,”
see Pringle,
We have long recognized that magistrate judges may “rely on the opinion” of law enforcement officers “as to where contraband” or other evidence “may be kept.”
United States v. Hargus,
“Additional evidence” connecting a defendant’s suspected activity to his residence may also take the form of inferences a magistrate judge reasonably draws from thе Government’s evidence.
See, e.g., Tisdale,
In other words, magistrate judges may draw their own reasonable conclusions, based on the Government’s affidavit and the “practical considerations of everyday life,” as to the likelihood that certain evidence will be found at a particular place.
Anthony,
One of these two types of “additional evidence” exists in all of the cases the parties have raised in this appeal. We thus conclude that our nexus precedents do not inexorably conflict. Accordingly, we will apply the above-stated principles to the facts of this case.
III.
We now turn to the sufficiency of the Govеrnment’s affidavit.
See United States v. Gonzales,
Once a magistrate judge dеtermines probable cause exists, the role of a reviewing court is merely to ensure the Government’s affidavit provided a “substantial basis” for reaching that conclusion.
Id.
at 238-39,
A.
One of the Supreme Court’s “central teaching[s]” on the Fourth Amendment is that probable cause is a “practical, nontechnical conception,” designed to operate in conjunction with the “commonsense,” “practical considerations of everyday life,” rather than the elaborate rules employed by “legal technicians.”
Gates,
A finding of probable cause rests not on whether particular conduct is “innocent” or “guilty,” but on the “degree of suspicion that attaches” to the Government’s evidence.
Illinois v. Wardlow,
We recognize that magistrate judges are vested with substantial discretion to draw all “reasonable inferences” from the Government’s evidence.
Gates,
The Fourth Amendment’s strong preference for warrants compels us to resolve “doubtful or marginal cases” by deferring to a magistrate judge’s determination of probable cause.
Upton,
B.
While the evidence in the Governmеnt’s affidavit could have been more compelling, we conclude it provided a “substantial basis” for the magistrate judge’s determination of probable cause. Ample evidence in the Government’s affidavit supports the conclusion that Andrews was a leading distributor of drugs in the Wichita area. Confidential sources, whose reliability was substantially confirmed by the Government’s independent investigation, indicated that Andrews received large shipments of drugs from Mexico, owned a stash house, provided drugs to gangs, and generally dealt in quantities of cocaine ranging from a half to a whole kilоgram. Based on the nature and scope of Andrews’ operation, the magistrate judge could reasonably infer that he served as a major artery through which drugs were pumped to lower-level drug traffickers, who operated on a vein-like scale.
The magistrate judge also had adequate grounds to find a substantial likelihood that Andrews sold Defendant distribution-level quantities of drugs. Andrews’ statement that a customer who had purchased two kilograms of cocaine was stopped at the intersection of Kellogg and Rock Road; not long after Defendant (1) left Andrews’ stash house carrying a briefcase, and (2) was stopped at that location; strongly suggested that this purchase was made by Defendant. Those versed in the field of law enforcement are certainly aware that two kilograms of cocaine is a significant quantity of drugs.
See United States v. Edwards,
Based on the Government’s affidavit, the magistrate judge could also reasonably conclude that Defendant purchased, or attempted to purchase, additional amounts of cocaine from Andrews. Defendant repeatedly contacted Andrews to arrange the purchase of illegal drugs.
3
Indeed, a common-sense interpretation of these exchanges suggests Defendant purchased an additional two kilograms of cocaine when he met with Andrews in a parking lot near his work.
See Spinelli v. United States,
Considering all of the сircumstances, a substantial basis in the evidence supports the magistrate judge’s determination that Defendant was engaged in the sale of illegal drugs. In addition, Special Agent Heiert noted, in his affidavit, that drug dealers often keep evidence related to their illegal activities at their homes. This observation provided the “additional evidence” necessary to establish a nexus between Defendant’s suspected drug trafficking activities and his residence.
See supra
Part II;
see also Sanchez,
REVERSED.
Notes
. For instance, a confidential source described “Roni” as driving a two-door, newer, *1276 white Honda. Andrews regularly drove a two-door, 2003, white Honda Accord.
. We identified this potential conflict in
United States v. Nolan,
. Viewing the Government’s evidence in the light most favorable to the district court ruling, as we are required to do, we cannot escape the conclusion that the district court clearly erred in suggesting Defendant’s phone conversations with Andrews did not concern the purchase of illegal drugs.
See Sparks,
. As we have upheld the constitutionality of the warrant, we need not consider the applicability of the good-faith exception established in Leon.
