Florida v. Riley, 488 U.S. 445 (1989)
Issue
Whether surveillance of a greenhouse in a residential backyard from the vantage point of a helicopter located 400 feet above is a 'search' for which a warrant is required under the Fourth Amendment.
Answer
No, because having a helicopter hover at 400 feet above your house does not violate a reasonable expectation of privacy.
Facts
The Pasco County FLA Sheriff got a tip that Riley was growing marijuana on 5 acres of rural property. A deputy sheriff investigated the tip and went to Riley's mobile home. Unable to see inside a greenhouse, which was behind the defendant's mobile home, the deputy returned with a helicopter and circled over the property at 400 feet.
The absence of two roof panels allowed the deputy to see, with his naked eye, what appeared to be marijuana growing. This gave probable cause for a judge to issue a search warrant which led to the discovery of a grow operation in the greenhouse. Riley successfully argued before the FLA trial court that the aerial search violated his reasonable expectation of privacy and Fourth Amendment rights but the case wended its way through multiple appeals before ending up in the US Supreme Court which held that police officials do not need a warrant to observe an individual's property from public airspace.
The Supreme Court held that the accused did not have a reasonable expectation that the greenhouse was protected from aerial view, and thus that the helicopter surveillance did not constitute a search under the Fourth Amendment. However, the Court stopped short of allowing all aerial inspections of private property, noting that it was "of obvious importance" that a private citizen could have legally flown in the same airspace:
Any member of the public could legally have been flying over Riley's property in a helicopter at the altitude of 400 feet and could have observed Riley's greenhouse.
Note: The court emphasized that the helicopter did not interfere with the normal use of the property:
As far as this record reveals, no intimate details connected with the use of the home or curtilage were observed, and there was no undue noise, no wind, no dust, or threat of injury.
So, having a sheriff's helicopter hover over your house at 400 feet looking for illegal activity is perfectly safe and does not violate a reasonable expectation of privacy requiring a warrant.
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But according to FLA legislature, hovering this Tello over someone's house presumptively violates a reasonable expectation of privacy. Make sense?
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