As a result of a combined interstate investigation of gambling, the Delaware State Police (“Police”) suspected that illegal gambling was being conducted through the use of the residential telephone of one Ollie Gordy (“Gordy”), a long time friend of Frank Miller (“Miller”), the focus of the investigation and one of the defendants herein. 1 The Police installed an electronic device, a dialed number recorder, (“DNR”), to monitor the frequency of phone calls made to and from the Gordy telephone. The DNR revealed an unusually large number of brief calls made in a short period, a *1067 pattern consistent with illegal gambling activity. The Police then applied to Superior Court for approval to intercept communications on the Gordy telephone. The Court authorized the interception, finding probable cause in a 77 page affidavit submitted by the State.
The affidavit included statements of the knowledge, experience and beliefs of the affiant police officers, reports of information received from cooperating police departments, information revealed by three undisclosed informants, profiles of the persons believed to be involved in the gambling ring, plus detailed surveillance reports, DNR analysis and subpoenaed toll call records. The Police asserted that they were unable to secure evidence to support a premises search warrant using normal investigative techniques and, thus, a wiretap was necessary.
Defendants allege that the wiretap affidavit did not provide evidence of probable cause for authorization. First, they contend that the warrantless DNR improperly established probable cause since the State failed to use normal investigative techniques to obtain evidence for a search. Second, they contend that the informant reports did not satisfy the basis of knowledge criteria for use of such information and that the other information in the affidavit did not corroborate the informant information. Third, they contend that the affidavit contained reckless falsehoods relating to probable cause. Finally, they contend that the search warrant issued as a result of the wiretap was executed in an unreasonable manner. Thus, the defendants reason, the evidence gathered as a result of the wiretap and search must be suppressed. These arguments will be discussed seriatim.
THE DNR.
Electronic telephone surveillance is a search within the meaning of the Fourth Amendment.
Katz
v.
United States,
This Court does not agree. Defendants do not allege that the DNR provided any information concerning the identity of the parties or the existence, substance, pur *1068 port or meaning of the communications monitored. In the absence of such evidence, the use of a DNR cannot be found to acquire the content as defined in 11 Del. C. § 1336(a)(3). 3 Therefore, the DNR evidence, in reference to the frequency of calls, was competent to show probable cause under the reasoning of Smith v. Maryland, supra. 4
USE OF NORMAL INVESTIGATIVE TECHNIQUES.
The defendants’ second contention is that the State was not justified in applying for a wiretap because it did not show that normal investigative techniques were unlikely to succeed, in accord with 11
Del. C.
§ 1336(h)(3)(f).
5
See, State v. Wilson,
Del. Super.,
Further, neither statute nor case law mandates that all normal investigative techniques must be exhausted; they require only that such techniques “reasonably appear to be unlikely to succeed if tried or to be too dangerous to employ.” 11 Del. C. § 1336(h)(3)(f); State v. Wilson, supra. The Court finds that the affidavit provides sufficient evidence that such techniques were unlikely to succeed.
INFORMANT INFORMATION.
The third contention made by defendants is that the informants’ tips did not provide probable cause for the issuance of a wiretap. Probable cause for a search warrant may be established through the use of hearsay evidence such as undisclosed informants’ information. In
Aguilar v. Texas,
As to the first prong “[t]he test for determining the reliability of an undis
*1069
closed informant is not his record in aiding arrests or convictions, but whether his information has ever been verified in the past.”
Sexton v. State,
supra. In this case all three undisclosed informants were known to law enforcement officers who were cooperating with the Delaware State Police in this interstate investigation.
6
These officers verified the past accuracy of the informants’ prior information. Reports of law enforcement officers can be presumed reliable.
United States v. Ventresca,
The second prong of
Aguilar
requires that the source of the informants’ knowledge must be disclosed so that the judge can independently determine that the informant had a proper basis for his information. The tip must be more than a mere repetition of “casual rumor or general accusation.”
State v. Ramirez,
Del. Super.,
A judge could not have determined the basis of knowledge from the references to the other two informants. Their information is indistinguishable from rumor. Nevertheless, that other informant information need not be discarded if it is corroborated by other material in the affidavit.
Draper v. United States,
supra,
State v. Ramirez,
supra.
Contra, Stanley v. State,
Md. App.,
[T]he Supreme Court has either used corroboration or assumed that it might be used in a variety of ways. Sometimes it appears that the court was seeking evidence of corroboration because no showing of the informant’s basis of knowledge (Draper, Ker, Adams), sometimes because the informants’ veracity was not otherwise established sufficiently (Jones, Harris), and sometimes for both reasons (Aguilar, Spinelli). Moreover, the type of information considered as tending to corroborate has ranged from the innocent conduct in Draper to that which created “strong suspicion” in Ker. 7 1 LaFave, Search and Seizure, § 3.3 at 555 (1978) (hereinafter “LaFave”).
See generally LaFave, § 3.3 at 561-65.
The DNR analysis, Pennsylvania Crime Commission Reports, and G-l’s information all corroborate the other two informants’ conclusion that a numbers bank was being operated from Ollie Gordy’s telephone. The Police surveillance reports, though depicting innocent activity if viewed independently, also corroborate the interaction of Frank Miller and Ollie Gordy at this location. Thus, this informant information is supported by the other material and is suffi-
*1070
dent to provide probable cause when the affidavit is read as a whole.
Mezzatesta
v.
State,
Del. Supr.,
FALSE STATEMENTS.
The defendants’ third contention is that false statements were recklessly included in the affidavit and if these were excised under a
Franks v. Delaware,
The allegedly false statements in the affidavit are primarily issues to be proven to the jury: whether Frank Miller made phone calls from Ollie Gordy’s telephone; whether a numbers bank was located in Ollie Gordy’s home; whether Ollie Gordy was handling daytime numbers activity; whether certain persons operated the bank; whether Debra Thorogood worked numbers activity at Improvizations. 8 Defendants’ proof of the falsity of these statements primarily consists of negative testimony by the various accused. This testimony does not meet a preponderance of the evidence standard in light of the mass of details submitted by the State in its affidavit.
The two clearly false statements, that Frank Miller owns Improvizations and that Ollie Gordy teaches in Pennsylvania, are not material to probable cause in light of the true facts: Frank Miller’s daughter owns Improvizations and Ollie Gordy is a teacher in Delaware. These two statements were not made by the affiants themselves but, nevertheless, were corroborated through other, though erroneous, sources. Thus, there is no evidence of recklessness on the part of the affiants. Arguendo, should they be termed reckless, the excision of these statements would have no affect on a finding of probable .cause from the remaining information.
Thus, even with the two erroneous statements excluded, the wiretap affidavit provided probable cause for authorization of electronic intervention. Evidence obtained through the tap was competent to provide probable cause for the subsequent search of Ollie Gordy’s residence.
EXECUTION OF THE PREMISES SEARCH WARRANT.
The defendants’ final contention is that the search of Ollie Gordy’s apartment was conducted in an unreasonable manner and evidence secured from it must be suppressed. The defendants standing to object to the manner of this search is problematical. They were not present when the search was conducted and they have asserted neither property rights in the premises nor possessory rights in the evidence seized.
See United States v. Jeffers,
*1071
Even if Gordy were to be joined, or Frank Miller held to have a privacy interest through his possession of a key, the claim would fail. Defendants maintain that the premises search was conducted in an unreasonable manner because the Police failed to announce themselves before entering the apartment. The knock and announce rule,
Miller v. United States,
In this case, as a result of surveillance, the Police were aware that Gordy had not returned from her job. They had taken the precaution of knocking on her door for three minutes, without response, before they entered with Miller’s key. In a similar, though forcible entry, in
United States v. Brown,
5th Cir.,
CONCLUSIONS.
This Court finds that a warrant was not required prior to the installation of the DNR, that the affidavit was sufficient to provide probable cause for the interception of telephone communications and, finally, that the premises search was executed in a reasonable manner. The motion to suppress must be denied.
IT IS SO ORDERED.
Notes
. The other defendants joining in this motion to suppress evidence are Joseph Miller and Debra Thorogood.
. “ ‘A pen register is a mechanical device that records the numbers dialed on a telephone by monitoring the electrical impulses caused when the dial on the telephone is released. It does not overhear oral communications and does not indicate whether calls are actually completed.’ [Citations omitted]. A pen register is ‘usually installed at a central telephone facility (and) records on a paper tape all numbers dialed from (the) line’ to which it is attached.”
Smith v. Maryland,
As to wiretapping and electronic surveillance, 11
Del. C.
§ 1336(a)(3) defines content as: “ ‘Contents,’ when used with respect to any wire or oral communication, includes any information concerning the identity of the parties to such communication or the existence, substance, purport or meaning of that communication. This statute is based on 18 U.S.C. § 2510(8), which was construed in
Smith v. Maryland,
supra. Prior to the
Smith v. Maryland
decision, this Court, in
State v. Ramirez,
Del. Super.,
. See note 2, supra.
. This Court makes no finding as to whether a DNR can be adapted for use in acquiring the content of a communication. There is no evidence of such use in this record. 11 Del. C. § 1336(x)(1) (1981 West Interim Supp.) grants the power to Superior Court to authorize the use of a touch-tone decoder as well as a pen register.
. 11 Del. C. § 1336(h)(3)(f) reads:
“(h) Each application for an order authorizing or approving the interception of a wire or oral communication shall be made in writing upon oath or affirmation and shall state:
******
(3) A particular statement of the facts relied upon by the applicant, including:
******
f. A full and complete statement as to whether or not other normal investigative procedures have been tried and have failed or reasonably appear to be unlikely to succeed if tried or to be too dangerous to employ;”
. The affidavit notes assistance from the Chester, Pennsylvania, police, the F.B.I. and the Pennsylvania Crime Commission, among others.
.
Draper v. United States,
. “Improvizations” is a business owned by Patricia Miller Fontaine, who employed one of the defendants in this case, Vernice Heard.
. Additional cases where the search was upheld and the premises were unoccupied at entry: Kraft
v. State,
Md.App.,
