In Kyllo v.United States (2001),the Court held that using a technological device to explore the details of a home that would previously have been unknowable without physical intrusion is a search and is presumptively unreasonable without:

Question

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The Court held that using a thermal imaging device to explore the details of a home was a search and therefore required a warrant. Without a warrant, the use of such a device is presumptively unreasonable under the Fourth Amendment. Therefore, the correct answer is C, a warrant.

In Kyllo V