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Katz is out of the Bag:
  Katz�s Weaknesses & the  Rapidly Emerging Technology of Today and the Future.� 
Robert Keates������������ ����������������������� ����������������������� ����������� ����������� Spring, 2005
1.����������� Enhanced  Visual Aids 
In Texas v. Brown ,  the court was confronted with whether the use of a flashlight by police  constituted a search.� The court held  that the use of artificial means to illuminate a darkened area simply does not  constitute a search, and thus triggers no Fourth Amendment protection. 
A  year after Katz, the Court of Appeals  for the Tenth Circuit heard a case involving the use of binoculars.� In Fullbright  v. United States,  investigators watched through binoculars, from 75 to 100 yards away, as the  defendant loaded untaxed spirits into a vehicle. � The defendant argued that the investigators  had illegally searched by using binoculars to breach the curtilage and privacy  of the home. � The court held that the investigator�s use  of binoculars did not change the character or admissibility of the information  gained. � The court noted that, although binoculars  enable the police to look into the house itself, the doors were wide open, and  the lights all turned on. 
Here,  the court begins to focus on several factors relevant to this paper.� The court recognizes that binoculars are in  general use in public, and a reasonable person would realize the possibility of  others peering into unveiled windows and open doors, either with binoculars or  with regular eyesight.� In this  analysis, the court seems to be correct in applying the Katz objective standard; that is, the analysis appears to be in  line with conventional public sentiment.�  Fullbright also marks the beginning of the court�s focus on the type of  information revealed rather than how the technology operates.� The court notes that the type of information  acquired through binoculars is the same as that which could have been seen with  plain sight.� As opposed to the later  cases this analysis is on point, especially considering that binoculars were  not new, and law enforcement could actually see a great deal without them.� 
����������� In United States v. Hensel,  officers used a high powered telescope to observe the defendant in his home,  through unveiled windows.� The Court of  Appeals for the First Circuit made a distinction between using the naked eye,  and using enhanced visual aids.� The  court held that the officers' observation inside the defendant�s home by  unenhanced vision, from a location where they may lawfully be, does not impair  a legitimate expectation of privacy. � 
Other  circuits have disagreed with the First Circuit�s ruling regarding enhanced  observation aids.� In the Second  Circuit, courts have held that the use of visual aids such as binoculars,  telescopes, and night scopes violates Fourth Amendment rights.  
����������� As in Fullbright, the Hensel court focused on the type of information revealed rather than how the  technology worked.� A telescope has the  potential to zoom in further than binoculars; however, both operate to reveal  what could be seen in less detail by the naked eye.� In both Fullbright and Hensel, the courts emphasize that  because the windows were open, there was no expectation of privacy, and rightly  so.� Telescopes are in general use by  the public, and have been for just as long as binoculars.�� This reliance on the lack of subjective  assertions of privacy (shaded windows) will change in subsequent cases, as  courts begin to focus more on the objective prong of Katz.� As criminals become  savvier, the court begins to stray away from their well-grounded application of  subjectivity, turning more toward the �type of information revealed� to  routinely hold no violation of the Fourth Amendment.� Objectively, it seems unlikely that an individual would find  telescopes more intrusive than binoculars, and certainly not when the windows  are open.� Most people are aware of  their privacy and guard against peeping toms and the like.� 
2.�������� Aerial  Searches
Perhaps  the ultimate in enhanced viewing involves aerial surveillance from airplanes  and helicopters.� Aerial surveillance  allows law enforcement to monitor an individual�s conduct without necessitating  a physical intrusion.� While these acts  generally cannot see inside the home, they are quite effective at viewing the  curtilage and area around the home, even when high fences and walls block view  from public streets and surrounding buildings.� 
In California v. Ciraolo ,  officers took to the skies in an attempt to observe marijuana growing in the  defendant�s yard, which was enclosed by a 6-foot outer fence and a 10-foot  inner fence.� From 1000 feet overhead in  a private plane and without a warrant, officers easily identified 8 to 10 foot  high marijuana plants in a 15 by 25 foot area in the yard. � The officers photographed the area with a  standard 35mm camera. � On appeal of his conviction, the defendant  argued that the warrantless aerial observation of his yard violated the Fourth  Amendment. � The Supreme Court granted certiorari, and  implemented the Katz two-part test:  first, whether the individual manifested a subjective expectation of privacy in  the object of the challenged search, and second, whether society is willing to  recognize that expectation as reasonable? � In applying the first part of Katz, the court concluded that one can  reasonably assume that the two fences were present placed to conceal the  marijuana from at least street-level views. � The court then expanded this concept, noting  that the fences would not have hidden the plants from the eyes of officers  perched on the top of a truck or a two-level bus, therefore rejecting the  notion that the defendant manifested a subjective expectation of privacy from  all observations of his backyard. � 
Despite  the fact that the court inserted this hypothetical into the subjective prong of Katz, it rightfully belongs in the  objective prong.� The court is  essentially saying that society would not deem the defendant�s expectation  reasonable, because the police could have found a better public location.� This hypothetical illustrates a clear  attempt by the court to bridge the gap between officers standing on the street  and taking to the skies, and is both utterly absurd and out of touch with  public sentiment.� For a vantage point  to be found public, the public must have regular access.� The top of a bus is not a location where the  public frequents.� Not only is it  extremely rare for individuals to climb aboard the top of a bus, but it is also  illegal.� This fact is ignored by the  majority, who gave weight to the fact that the airspace in which officers flew  above the defendant�s house was within FAA guidelines and laws. � If members of the general public would not  flag down a bus and climb atop, it is unlikely that society would welcome  officers to do the same, without any feelings of intrusiveness. Justice  O�Connor echoed these concerns in her concurrence in Florida v. Riley,  discussed below.� Justice O� Connor made  clear that if the public rarely travels at such altitudes, �the observation  cannot be said to be from a vantage point generally used by the public.� 
In  examining Katz�s second prong, the  court held that any expectation of privacy the defendant had regarding the  aerial observation of his garden was unreasonable and not an expectation that  society is prepared to honor. � The court reasoned that any member of the  public flying in this airspace could glance down and observe everything that  these officers saw. � By imagining that an individual flying  overhead could possibly view the plants, the court leaps to the conclusion that  the individual would have seen the plants; amounting to the reasonableness of  the police conduct. 
Three  years later in Florida v. Riley,  the Supreme Court granted certiorari to decide whether surveillance of a  partially covered greenhouse in a residential backyard from a helicopter  located 400 feet above the greenhouse constituted a Fourth Amendment  violation.� The court relied on Ciraolo to point out that because the  sides and roof of the defendant�s greenhouse were left partially open, he could  not have reasonably expected the contents of his greenhouse to be immune from  an officer peering down from an aircraft. � The court noted that although this case  involved a helicopter, the public airspace was still utilized, and there was no  indication that public helicopter flights were unheard of in Pasco County,  Florida. � The court dismissed the defendant�s argument  regarding the low altitude, observing that the helicopter had been flying  within the bounds of the law and flight regulations. � Based on these findings, the court held that  the defendant�s Fourth Amendment protections were not violated. 
As  in Ciraolo, the court misconstrues  the objective prong of the Katz test.� Few members of society would feel  that a police helicopter, or any helicopter, flying under 500 feet is  reasonable, and does not intrude upon their privacy.�� This is exactly the type of behavior that is noted in Orwellian  novels.� The court does say that  helicopter flights such as these were not unheard of, but even if true, that is  a far cry from common.� It is not  unheard of for law enforcement agents to profile suspects; however this does  not modify the act into one that society deems objectively reasonable.
In Dow Chemical Co. v. United States,  the court reaffirmed Ciraolo and Riley, holding that taking aerial  photographs from navigable airspace is not a search prohibited by Fourth  Amendment.
3.����������� Tracking  Devices
����������� In the 1970�s, law enforcement began  using tracking devices, informally known as beepers, to trace movements by  suspects or their belongings.� A beeper  emits a signal that can be monitored by a radio receiver, yielding no other  information aside from its location. � As technology has advanced, beepers and  trackers have decreased in size, from the size of a cigarette pack, to the size  of a penny, and smaller. 
����������� One of the first instances before  the court in which law enforcement utilized this tracking device was United States v. Emery. � Federal  agents inserted a tracking devices into two packages suspected of containing  cocaine. � After the defendant picked up the packages,  the agents maintained surveillance and monitored the beeper's signal. � The defendant asserted that the warrantless  insertion of the beeper into the packages was unconstitutional. � The court looked to the defendant�s  reasonable expectation of privacy, and concluded he had none. � They reasoned that the beeper was not  attached to his person, or to an object legitimately possessed by him, but  rather it was inserted into a package containing contraband, which he had no  right to possess. � 
����������� Here, the court looked solely at the  type of information revealed rather than how the technology was used.� The tracker itself could only relay  information regarding the location of the contraband, which the defendant had  no legal right to possess.� The court  ignored the beepers capabilities, and set the stage for this evaluation in  later cases.
����������� In United States v. Knotts,  the Supreme Court held there was no violation of privacy when officers placed a  tracker on personal lawful property.�  With the consent of the seller, law enforcement officers placed a beeper  in a five-gallon drum containing chloroform purchased by one of the  co-defendants. Officers monitored the progress of the defendant�s car, carrying  the chloroform from its place of purchase in Minneapolis, Minnesota, to a  secluded cabin near in Wisconsin. � Officers secured a search warrant and  subsequent arrest by relying on the location of the chloroform produced by the  beeper, as well as three days of surveillance of the cabin. � In finding no Fourth Amendment violation,  the court held that scientific enhancement of this sort revealed merely the  same information as visual surveillance;  a police car following the defendant throughout his journey could have observed  the same thing. � Lastly, the court acknowledged that there  was no indication the beeper was used in any way to reveal information as to  the movement of the drum within the cabin, or in any way that would not have  been visible to the naked eye from outside the cabin. 
����������� Similar to Emery, the court again focused on the type of information revealed;  that is, the beeper revealed the same type of information that police can  gather with their own senses.� The  courts reasoning is ultimately flawed.�  People who drive their cars on the road are in public view, and  continually expose their whereabouts to the public as they travel.� Because they are visible, there is no reason  why police cannot do the same.� However,  people do not expect to be followed on the streets.� When a person notices she is being followed on the road, she  becomes unnerved, and take precautions.�  She may drive faster, make more turns, and attempt to lose the  tail.� This is because being followed  goes to the heart of what we consider private; the importance of being left  alone. � Stalking laws prohibit this type of behavior  by the general public, and although officers may be justified in investigating  crime, at the very least the following of citizens implicates social norms and  privacy.� 
Admitting  that police may lawfully investigate and tail an individual, the question  centers on the difference between physical tailing by police and the use of  beepers.� Law enforcement in Knotts electronically tracked the  defendant from Minnesota to Wisconsin.�  It is questionable whether police could have maintained the tail for that  long without being spotted.� The court  seemed to assume that an officer�s ability to follow a suspect�s car temporarily  amounted to a tail that could follow the suspect all day, in any area.� Indeed, it may be impractical and improbable  for a police officer to follow a suspect at all times, as a tracking device can  do. � There is also sociological evidence that  society views tracking as more intrusive than mere tailing by police.�� A 1993 study asked non-lawyers about their  expectations of privacy regarding police practices and search techniques. � Experimenters presented subjects with a list  of law enforcement activities, many of which involved Supreme Court cases, and  asked each subject to rank the activities in order of intrusiveness. � In one ranking relevant to Knotts, subjects rated using an  electronic tracking device on a car as significantly more intrusive than police  physically following a suspect in a car. � This finding is consistent with the  assertion made in this paper that physical trailing by police in a car is not  absolute, and incorporates the possibility of a suspect who becomes aware of  the tail.� A tracking device allows law  enforcement to obviate any awareness of the suspect, distances, traffic, and  many other factors that continue to allow for anonymity in pubic.
Spy World, at https://www.spyworld.com/Track.htm; see also Spys Like Us: An Airtight Security Company, at https://www.airtightinvestigations.com/surveillance_equipment.html.
Sherry F. Colb, What Is a Search? Two Conceptual Flaws in Fourth Amendment Doctrine and Some Hints of a Remedy, 55 Stan. L. Rev. 119, 136 (2002).