Main Page | See live article | Alphabetical index Detective Casey is a fictional character in the Mickey Mouse universe. He is Chief O'Hara's head detective, first appearing in The Plumber's Helpers. Despite his occupation he is not the brightest detective in the world. That's why Chief O'Hara recruits Mickey Mouse to solve some of his cases. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.