The plain view doctrine is a concept in criminal law that allows a law enforcement officer to make a search and seizure without obtaining a search warrant if evidence of criminal activity or the product of a crime can be seen without entry or search.
Some jurisdictions recognize a "plain-smell" exception to the requirement that law-enforcement officers obtain a warrant before conducting a search. In a case involving a police dog, one court has held that, just as evidence in plain view of officers may be searched without warrant, evidence in plain smell may be detected without warrant. However, another court has held that odor alone is not sufficient to establish probable cause to search, but is one factor to consider in the totality of circumstances.
REQUIREMENTS FOR SEIZURE OF EVIDENCE IN PLAIN VIEW:
