What is Emergencies and Hot Pursuit?
The rationale here is similar to the automobile exception. Evidence that can be easily moved, destroyed or otherwise made to disappear before a warrant can be issued may be seized without a warrant. Furthermore, if a suspect enters private property while being pursued by officers, no warrant is required to enter that property in order to continue pursuit, even if the suspect is in no way connected with the property owner.
EXAMPLE: While running from police, Fred enters Joe’s garage and the police follow Fred in. (They are not required to give up pursuit until such time as they can obtain a search warrant for the premises.) While in Joe's garage, police notice illegal drugs in plain view. They can arrest Fred for his crimes, and they can also seize the drugs and arrest Joe for possession of the drugs, even though Joe had nothing to do with Fred and the police were in Joe’s garage only because of the hot pursuit of Fred!