Speaking of disposing of bodies, anyone who hasn't seen "The Irishman" with Robert DeNiro might be interested in seeing it. It's based on the Jimmy Hoffa disappearance, and posits a plot explaining it. Basically, as an inside mob hit and quick cremation that did away with the remains, when Jimmy got out of line with the mob boss. DeNiro played an Irish hit man who got close to the mob boss and was tapped to off Hoffa because he was close to Jimmy and wouldn't be suspected. The subject is mighty harsh, but the film is really well done.