Kyllo v.United States held that using a technological device to explore details of a home that would have been unknowable without physical intrusion is not a search and therefore does not need a search warrant.

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Kyllo v. United States held that using a thermal imaging device to detect heat patterns inside a home constituted a search under the Fourth Amendment and required a search warrant. The Court stated that the technology used in this case was not in general public use and thus violated the reasonable expectation of privacy that people have in their homes.

Kyllo VUnited States Held That Using a Technological Device to Explore