North Carolina Police Law Institute Practice Test 2026 - Free Police Law Practice Questions and Study Guide

The important idea is that using a thermal-imaging device to detect heat inside a home reveals information that normally isn’t accessible without a search. The Fourth Amendment treats that as a search of the home, and a warrant is generally required whenever the device is not in common public use. A thermal image can disclose details about activity inside the residence (like growing marijuana) that the naked eye cannot, so conducting the imaging without a warrant would run afoul of the rule requiring a warrant for such a search. Therefore, to lawfully seize the marijuana plants, you must obtain a search warrant before using the thermal-imaging device. If you had a warrant first, the subsequent seizure would be supported by the probable cause established in the warrant application (often based on the tip corroborated by the imaging). The other options don’t fit because imaging alone does not authorize seizure, and consent or a blanket ability to seize without a warrant isn’t the rule for interior home searches.