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UNIVERSITY OF THE DISTRICT OF - UDC Law Review

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of Kyllo’s limitations on sense-enhancing technology directed at the home. Interestingly enough, it may be Justice Stevens’s<br />

Kyllo interpretation that the Court ultimately embraces. In 2005, Justice Stevens authored the Caballes opinion, which<br />

permitted the suspicionless canine sniff of a lawfully stopped vehicle.125 In dicta, Justice Stevens explained that the<br />

suspicionless use of a canine sniff to investigate the exterior of Caballes’s vehicle was entirely consistent with Kyllo because<br />

the sniff revealed no lawful activities or information.126 By pressing Kyllo’s second explanation concerning the<br />

contraband/noncontraband nature of the information discovered, the Court appears ready to reorient Kyllo to bar only<br />

warrantless use of sense-enhancing technology that might also reveal noncontraband information.<br />

*857 Additionally, the Court has considered the warrantless use of other sense-enhancing technology directed at the home<br />

prior to Kyllo, cases that should prove helpful in analyzing canine home-sniffs. One case in particular, United States v.<br />

Karo,127 which was cited favorably in Kyllo, provides insight into the home-sniff issue. Karo involved the use of beeper<br />

technology128 to track the movement of cans filled with chemicals used in the manufacture or refinement of illegal street<br />

drugs after the cans had been hidden inside a private home.129 The Karo Court concluded that warrantless monitoring of the<br />

beeper violated the Fourth Amendment because the beeper provided “information” about the interior of the home that could<br />

not have been obtained through observation from outside the home’s curtilage.130 The Court analogized the warrantless<br />

monitoring to surreptitious physical entry by DEA agents to search the home to determine whether the can of ether was still<br />

present, a clearly impermissible surveillance technique.131<br />

Karo is potentially significant because it is a post-Jacobsen case, yet the decision uses expansive language to describe the<br />

protection from police discovery afforded to property hidden in a private residence, language that is arguably inconsistent<br />

with the Jacobsen premise. Karo states that the Fourth Amendment protects a person from police discovery of “information”<br />

about the interior of the home,132 “a critical fact” about the interior of the premises,133 whether a “particular article” is<br />

located within the home,134 and concerns about monitoring “property” that has been withdrawn from *858 public view into a<br />

home.135 While some of these references were simply descriptive of Karo’s facts concerning monitoring of the home to<br />

determine whether the can of ether was still present,136 other language in Karo appears to have broad applicability and may<br />

be relevant to the canine home-sniff analysis. In particular, the Karo Court noted:<br />

We cannot accept the Government’s contention that it should be completely free from the constraints of the Fourth<br />

Amendment to determine by means of an electronic device, without a warrant and without probable cause or<br />

reasonable suspicion, whether a particular article--or a person, for that matter--is in an individual’s home at a<br />

particular time. Indiscriminate monitoring of property that has been withdrawn from public view would present far<br />

too serious a threat to privacy interests in the home to escape entirely some sort of Fourth Amendment oversight.137<br />

This language is expansive enough to bar monitoring for any type of item, including contraband. The question then is<br />

whether this is a supportable interpretation of Karo’s reasoning. Perhaps it is. Certainly, there is nothing in Karo’s expansive<br />

discussion to suggest that contraband hidden in the home should be excluded from the Court’s treatment of property<br />

“withdrawn from public view,” and when the Court has intended to limit its holding to certain types of property, it has<br />

certainly made its intentions known.138<br />

As an additional point, the Karo Court referenced the use of technology to locate whether a particular person is in a home at a<br />

particular time.139 While knowing a person’s location is obviously helpful in an ongoing criminal investigation, the location<br />

of a person who has an outstanding arrest warrant is of critical importance to the police. In a sense, the fugitive is like<br />

contraband: (1) with an arrest warrant, police can enter the suspect’s home to arrest (“seize”) him,140 and (2) with a search<br />

warrant, police are authorized to enter a *859 third person’s home in order to make the arrest.141 Karo suggests that<br />

technology-based monitoring of a home to determine the location of a person, apparently even someone who could be<br />

lawfully seized upon discovery, would be impermissible. If police are barred from using technology directed at a home to<br />

locate such a person, then “information” about the home should also be interpreted to include contraband.<br />

Interestingly enough, technology that would enable police to determine an individual’s exact location already exists.142 A<br />

locational scanning device that would allow police to detect an individual’s presence143 by identification of a computer chip<br />

embedded into the individual’s driver’s license is in the development stage.144 While it could be argued that this proposed<br />

technology would detect only the driver’s license rather than the actual fugitive individual, this is an artificial distinction<br />

because, similar to a cell phone, people ordinarily keep their driver’s license on their person or close at hand.145 An<br />

analogous inference arises when a drug- *860 detection dog alerts to a methyl benzoate source inside a private home. Like<br />

the inference that a fugitive is physically present when the fugitive’s driver’s license or cell phone is detected inside a private<br />

home, detection of methyl benzoate by a drug-detection dog enables police to infer that contraband is also present.<br />

138

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