Police had probable cause to arrest defendant at railroad station for illegal narcotics activity, after trained drug-sniffing dog had alerted to his suitcase. The dog was taken down the corridor of the train car and alerted to the door of the roomette. After the narcotics detection dog sniffed and alerted to the bag, the bag was searched under the abandonment warrant exception. Circuit A canine sniff for narcotics of a train sleeper compartment from a public corridor did not constitute a search. Lawful canine sniff for narcotics of train sleeper compartment from public corridor, that resulted in canine alerting, provided probable cause for seizure and search of train passenger's bags.
Exigent circumstances justify exception to the Fourth Amendment warrant clause.
Probable cause that train roomette contained drugs justified search of entire roomette, without bringing dog inside to sniff more directly. The defendant was issued a receipt for his bags and he immediately left on another train. About 15 minutes later, the narcotics' detector dog alerted to the bags and a search warrant was obtained. He appeared to divert his eyes from those of officers when they followed him. Detention of his luggage for 45 minutes until dog sniff for narcotics was performed was reasonable.