Question

which of the following conditions requires a police officer to get a warrant before searching a home?
being invited to search a home by the home’s resident
suspicion of a crime previously committed in the home
witnessing a crime in progress inside a home

Explanation:

Under legal rules governing searches, consent (being invited) and exigent circumstances (witnessing an ongoing crime) are exceptions to the warrant requirement. Only suspicion of a past crime in the home does not fall under these exceptions, so a warrant is required.

Answer:

suspicion of a crime previously committed in the home