Steal this idea - "The Methuselah Mess"

Ah ha! Someone recognizes a problem I thought about years ago--aging criminals. You can go a lot of ways with a story idea like this. (comedy) Octogenarian inmates escape during a visit by retiree volunteers and stir up trouble in Tampa, Florida as they hunt for a hidden bounty of jewels from a 1940s heist. (crime) Septuagenarians, Billy and Bob Jones, seek revenge on the woman who testified against them in their 1949 conviction only to discover that she gave birth to a child--one of theirs--who's now a cop. (horror) Ninety-year-old Samuel Leumas is harassed by a vicious prison warden and a sadistic guard shortly before his release and then discovers he's not aging, but getting younger by the day and has revenge on his mind.

Yeah, I know, there are a few movies with aging criminals, but they are mostly vibrant (and way to mobile) sixty-year-olds.