Question

which of the following best describes the holding of kyllo v. united states (2001)?
the use of a drug - sniffing dog is constitutionally permissible
the use of a thermal imaging device to monitor activity inside a home requires a warrant
evidence may still be admitted even if there was a fourth amendment violation if the evidence would have been discovered through another way

Explanation:

In Kyllo v. United States (2001), the Supreme Court held that using a thermal imaging device to monitor activity inside a home constitutes a "search" under the Fourth Amendment and thus requires a warrant. The first option relates to a different case (e.g., Illinois v. Caballes for drug - sniffing dogs), and the third option describes the "inevitable discovery" doctrine (not related to Kyllo).

Answer:

The use of a thermal imaging device to monitor activity inside a home requires a warrant