Final answer:
The legal issue presented in Kyllo v. United States was whether the use of thermal imaging technology by the police to obtain information about the interior of a home constituted a search under the Fourth Amendment.
Step-by-step explanation:
The legal issue presented in Kyllo v. United States was whether the use of thermal imaging technology by the police to obtain information about the interior of a home constituted a search under the Fourth Amendment.
The Supreme Court held that using thermal imaging to detect heat patterns in a home amounted to a search and therefore required a warrant.
This case focused on the protection of privacy rights and the interpretation of the Fourth Amendment in the context of advancing technology.