According tot he fourth amendment, in order to legally search a person's property a government must: A) have a search warrant
The fourth amendment of united states prohibit the government to conduct unreasonable searches and seizures. The only reason that can be use to justify search without a warrant is if it involves emergency situations (such as if the police heard a scream or gunshots).
I think it was when people would line up at soup kitchens because when people lost their jobs, they didn't have money to buy food. Someone please tell me if I'm wrong.