In the case of Massachusetts v. Painten, the U.S. Supreme Court ruled in 1967 that evidence obtained through a warrantless search could not be used against an individual in court. The defendant, William Painten, was convicted for possessing stolen goods after police officers conducted a warrantless search of his car and found items reported as stolen from a nearby store. However, upon appeal to the Supreme Court, it was determined that this violated his Fourth Amendment rights which protect individuals from unreasonable searches and seizures without probable cause or a validly issued warrant by law enforcement officials. Therefore, since there had been no exigent circumstances justifying such action nor any consent given by Painten for them to conduct their search at that time - all evidence they'd collected during it were deemed illegally obtained and thus excluded from being presented at trial under what's known as 'the exclusionary rule'. This ruling ultimately led to Painten’s conviction being overturned.

In the dissenting opinion for Massachusetts v. Painten, Justice William O. Douglas argued that the majority's decision to uphold a warrantless search and seizure violated Fourth Amendment protections against unreasonable searches and seizures. He contended that there was no exigent circumstance or immediate danger present which would justify bypassing the requirement of obtaining a warrant before conducting such an invasive action as searching someone's home and seizing their property. Furthermore, he criticized the majority for expanding police powers at the expense of individual liberties by allowing law enforcement officers to decide when it is necessary to circumvent constitutional safeguards based on their own subjective judgment rather than objective legal standards established by courts.