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Detective Casey, or simply Casey, is an anthropomorphic dog.
Chief Seamus O'Hara's number one helper in the Mouseton Police, Casey is a fairly competent detective with a tendancy to be overconfident in his abilities. Casey refuses to admit that "amateur" detectives like Mickey Mouse might possibly be right over him, even after Mickey has repeatedly proved him wrong. Despite his frequent bumbling and bothersome ego, Casey is ocnsidered by O'Hara to be a staunch ally and a good friend.
Behind the scenes
Detective Casey was created in 1939 in Mickey outwits the Phantom Blot.