Aрpellees Frederick H. Moore and Brock P. Bobisink, and another, were charged with conspiracy to manufacture and distribute and with manufacturing and distributing phencyclidine, a Schedule III controlled substance, in violation of 21 U.S.C. §§ 841(a)(1) and 846. Prior to trial, they moved to suppress evidence seized by government agents after an investigation during which electronic beepers were used both to help monitor appellees’ movements and to keep track of the whereabouts of certain chemicals in their possession. Holding that the use of the beepers violated the fourth amendment, the district court allowed the suppression motion.
United States v. Bobisink,
The facts were before the district court in the form of two affidavits of DEA agents submitted with the applications for search warrants, and the testimony at the suppression hearing of Special Agent Francis J. Elliott. Agent Elliott had received a call from the manager of the Doe & Ingalls Chemical Company of Medford, Massachusetts, informing him that Moore, purportedly representing a company called Plástico at 26 Allston Street, Allston, Massachusetts, had placed an order for a substantial quantity of chemicals and had picked up the chemicals for $776.36 in cash. While picking up the first batch of chemicals, Moore had placed another larger order for mostly different chemicals. (The names and amounts of all the chemicals were obtained by Agent Elliott and later listed in his affidavit; in the affidavit the agent stated that he was “familiar with the basic processes involved in the production of Schedule III controlled substances.”) 1 Upon investigation, Agent Elliott found that 26 Allston Street, Allston, Massachusetts, was an apartment house. On April 11, 1975, with the permission of Doe & Ingalls, DEA Agent Witt placed a self-powered electronic signalling device (a “beeper”) within one of the cardboard boxes containing the chemicals which Moore had ordered on March 26. On April 14, Moore and Bobisink came to Doe & Ingalls to pick up the chemicals. Driving a U-Hаul van, they parked in the lot of a nearby shopping center and went inside. The chemicals ordered on March 26 were available, with the exception of peperidine. While the two were inside, Agent Elliott placed a second beeper on the left rear undercarriage of the van. Moore and Bobisink got in the van with the chemicals and went on their way. Elliott and another DEA agent followed, alternately relying on visual surveillance and on the two beepers. The beepers were broadcasting at different frequencies, and the agents could receive only one signal at a time. At a point when the van was travel-ling on Route 6 on Cape Code, the agents lost visual contact and could not receive a signal from either beeper. But observing the van on Route 124 crossing over Route 6, the agents quickly exited themselves, proceeded down Route 124 approximately one mile, and saw the van parked in front of a house in Brewster, Massachusetts. Agent Elliott testified that the agents relied on the beepers 50% of the time while following defendants. From April 14 to April 29, the agents maintained sporadic surveillance of *109 the Brewster home. Until the battery became worn, they used the beeper in the box of chemicals to determine that the box was still in the residence. On April 23, Elliott searched the records of the DEA computer bank of registrants and determined that neither Moore nor Plástico was licensed to manufacture controlled substances.
On April 29, Moore and Bobisink returned to Doe & Ingalls to pick up thе one chemical, peperidine, that had not been available on April 14. While Moore and Bobisink were inside, Agent Elliott attached a beeper to the gasoline tank of Moore’s 1966 Mustang. Elliott testified that he did not follow the Mustang, but instead the vehicle was trailed by another agent, who he assumed used the beeper to maintain surveillance. The vehicle was driven to the Brewster residence, where defendants were observed carrying the package of peperidine inside. Beginning оn April 29, a 24-hour surveillance was maintained on the Brewster residence. That evening, according to Elliott’s affidavit, he “detected a strong odor of ether emanating from the house and also observed the house being cross-ventilated by the opening of doors.” The affidavit avers further that at that time “[t]he electronic surveillance signal placed in the chemicals . . . indicated the chemicals acquired on the 14th of April and observed and deposited at that house on the 14th of April remаined in that house.” On May 2, DEA agents made application for a search warrant for the Brewster property. The warrant was executed on May 7, and a number of chemicals and apparatus was seized. The following day a search warrant issued for the Allston apartment; its execution resulted in seizure of small amounts of chemicals and apparatus.
At the suppression hearing, appellees’ primary argument went to the alleged illegality of the beepers, but they also argued, as they do on appeal, that no search warrants should have issued since the affidavits did not establish that the chemicals purchased and appellees’ activities were directed towards manufacturing the controlled substance, phencyclidine. The district court, dealing only with the beeper issue, suppressed the evidence obtained from the searches because it held that “placement of the beepers under the circumstances of this case was a search аnd seizure under the Fourth Amendment requiring issuance of a search warrant.” The Government asserts that was error. It urges us to sanction use of the beeper as a new and useful surveillance device.
Before turning to the question of the beepers, we consider the sufficiency of the affidavits underlying the warrants to search the Brewster house and the Allston apartment. Affidavits are most often criticized as being too conclusory, i. e. lacking in sufficient underlying facts and circumstances.
See, e. g., Aguilar v. Texas,
A commonsense reading of the affidavit indicates that Agent Elliott, being familiar with the basic processes of manufacturing controlled substances, had determined from the nature and quantity of the purchased chemicals, and from associated facts such as that Moore was operating out of a residence and the defendants’ later conduct, that an illegal substance was being manufactured. While he did not state that chemicals of this type and amount comprise the formula for phencyclidine, or enough of it to show that phencyclidine was a probable end-product, that conclusion seems implicit. In
United States v. Ventresca,
We come next to use of the beepers, a question that, in the broad sense, is unlikely to be settled finally in this court. Beepers, which do not relay oral communications, are not within the definition of wirеtapping devices. See 18 U.S.C. § 2510(5). Giving off a steady signal which may be picked up by a receiver, they are useful to keep track of a vehicle, person or object. They do not permit a pinpoint fix, but enable agents to know when the beeper is nearby. The question is whether use of a beeper constitutes, in different settings, such an intrusion upon personal privacy as to violate the fourth amendment.
In
Katz v. United States,
The defendants argue that citizens have “a reasonable expectation of privacy in their movements”, and that the “possibility of being followed about in public by governmental agents” does not mean that they anticipate “that their every movement will be continuously monitored by a secret transmitter”. Defendants draw an analogy to Katz: while the telephone booth itself was public, the defendant was entitled to keep out the “uninvited ear”. While transporting chemicals on the public highway is “subject to the eyes of the public”, defendants, so they assert, may keep out the “uninvited monitoring device”.
We find no merit in the Government counter argument that thе beeper was jus
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tified simply because the substance being manufactured was a dangerous drug which the public would not want to go undetected. Conduct which violates the fourth amendment is not made legal merely because it helps ferret out crime. If that were so, any invasion of privacy would be acceptable if it helped the police. It is true that the reasonableness of a search and seizure is sometimes said to involve balancing the Government’s interest in the intrusion against the individual’s intеrest in privacy.
See, e. g., United States v. Martinez-Fuerte,
The Government may be struggling to argue another proposition. We and other courts have upheld the placing of beepers, without warrant, in contraband, stolen goods and the like on the theory that the possessors of such articles have no legitimate expectation of privacy in substances which they have no right to possess at all.
United States v. Emery,
The present case involves two generic uses of the beepers; first, to keep track of the motor vehicles; 2 and second, to ascertain if the chemicals were still in the house in Brewster. Each of these uses requires, we believe, separate analysis. While we hold that both uses of beepers intruded to some degree upon defendants’ reasonable privacy expectations, we believe that the privacy interest affected by using a beeper to maintain surveillance of a vehicle on public roads is much less than in the later instance. We hold, therefore, that given probable cause, no warrant was required for the vehicular surveillance.
Turning first to the vehicular surveillance, we do not find it critical that the beeper placed in the package of chemicals was inserted before title to the chemicals passed to defendants, while the beepers affixed directly to the vehicles wеre attached without the owners’ permission and hence involved a trespass.
See United States v. Hufford,
The basic question is simply whether the use of beepеrs so implanted to monitor the movements of the U-Haul van and the 1966 Mustang from Doe & Ingalls in Medford to the residence in Brewster violated defendants’ reasonable expectations of privacy. Defendants argue, that they had a reasonable expectation that their vehicle’s movement would not be continuously monitored and tracked by use of a transmitter implanted without their knowledge or consent on or in the vehicle in which they were riding.
But while this may be so, we agree with the Government that thе privacy expectations of one operating a vehicle on public roads are considerably less than those of one speaking on the telephone from a closed booth, as in
Katz.
In
Katz
the Court spoke of the “vital role that the public telephone has come to play in private communication”, and expressed the urgency of extending the fourth amendment to oral statements meant to be kept private.
Use of a beeper to monitor a vehicle involves something more, however, than magnification of the observer’s senses as in the use of a helicopter, binoculars, radar, or the like. Whether or not the beeper is legally implanted by use of stealth or attached by a technical trespass to the vehicle, it transforms the vеhicle, unknown to its owner, into a messenger in the service of those watching it. While a driver has no claim to be free from observation while driving in public, he properly can expect not to be carrying around an uninvited device that continuously signals his presence.
We conclude that while the intrusion involved in surveillance of a vehicle by beeper is considerably lessened by the fact that one driving on public roads knows that he is subject to public scrutiny, still the intrusion cannot be written off as non-existеnt. And even though searches of automobiles often present exigent circumstances that permit the Government to dispense with warrants,
see United States v. Chadwick,
supra,U.S. at-,
On the record before us, we find ample evidence that at the time the vehicular surveillance was undertaken, the agents had probable cause to believe that a controlled substance was about to be made illegally. The call from the drug company, the discovery that the address given by the purchasers was not one where a chemical manufacturer would operate, and the nature of the chemicals purсhased, in light of the agents’ familiarity with the manufacture of controlled substances, together created a sufficient basis for believing a criminal enterprise was under way. 4 We therefore hold that the use of the beepers to monitor the vehicles did not violate the fourth amendment even though no warrant was obtained.
This does not end the matter, however, since the beeper inside the box of chemicals was used after April 14 to determine the continued presence of the packаge inside the Brewster residence. Agent Elliott so testified; his affidavit filed in support of the search warrant for the Brewster property indicates that the beeper was used on April 29 to determine that the chemicals were still in the house. With respect to the need for a warrant, this use of a beeper must be distinguished from its use to monitor the movements of a vehicle on public highways.
United States v. Chadwick, supra.
The lessened expectancy of privacy applicable to vehicles has no relevance to this situation, and we can think of no other exception or analogy that might excuse the agents in these circumstances from securing a warrant, which provides the safeguard of the “detached scrutiny of a neutral magistrate”.
Id.
-U.S. at-,
“It may be that it is the obnoxious thing in its mildest and least repulsive form; but illegitimate and unconstitutional practices get their first footing in that way, namely, by silent approaches and slight deviations from legal modes of procedure.”
Boyd
v.
United States,
Because warrantless use of the one beeper inside the box of chemicals to deter
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mine their continued presence in the Brewster residence infringed on defendants' fourth amendment rights, evidence obtained from the searches must be suppressed unless it was comе at not by exploitation of the illegality but instead by distinct means which purge the evidence of the primary taint.
Wong Sun v. United States,
The order is vacated and the matter remanded for further proceedings in accordance herewith.
Notes
. Although the alleged end-product, phencyclidine, is a cоntrolled substance, none of the chemicals that were purchased are within that category; they may be possessed legally. One of the ordered chemicals, peperidine, was described by Agent Elliott in his affidavit as “a necessary chemical for creating Phencyclidine”.
. For the fourth amendment purposes, where the issue is whether there was an invasion of a privacy interest, we think it makes better sense to classify the beepers functionally, i. e. by whether or not they were used to tail a vehicle, or else for some different purpose, rather than by whether the beepers were in a package or affixed to the vehicle’s underbody. To the extent the packaged beeper was used to follow the vehicle, we think it presents the same fourth amendment problems as the attached beepers.
. Judge Ainsworth urges a more relaxed “reasonable cause” standard.
See United States v. Holmes,
. The duration of the planned surveillance in this case was for a period limited to the delivery of the materials to the place of manufacture. We do not consider what if anything might be additionally required if the planned surveillance by beeper contemplated an extensive period of time.
