Who is Bob Zemco?
Bob Zemco is the name of a character in the film, plus he is credited as the actor who plays "beard" (the character with the shotgun at the end). Is this an error in the credits? Seems unlikely.
sharehttp://www.imdb.com/name/nm0954773/bio
Bob Zemko, his IMDB bio says he's from Chicago, and the actor who played him is Peter Cetera.