I have been watching this old MGM movie (probably set in 1980's or 90's). It's about this cop/detective (or an ex-convict who was hired as a cop/detective) who tries to stop religion based cult. It's a black cult and I think it's the voodoo type. Anyway I remember that the movie ends with this guy killing the leader but then while driving away for a better life with his new gal, the bad guys shoot and kill her.
Anyone know which movie this is?