Alan Tompkins was a member of Scotland Yard and a close friend of Buck Williams and Dirk Burton. In "Left Behind", he met with Buck in a pub in London to tell him that Dirk Burton's death wasn't a suicide, but rather commissioned by Joshua Todd-Cothran, and that he was being threatened by Cothran and by his superiors at Scotland Yard to keep silent about the issue. Alan died when a bomb rigged in his car exploded.
In Left Behind: The Movie, Alan was played by Philip Akin, and was working in Chicago instead of London.