Directed by Don Siegel and starring Walter Matthau, Charley Varrick follows a small-time criminal whose bank robbery inadvertently targets mob money, forcing him into a tense struggle to survive while evading both the law and organized crime. The film combines crime-driven tension with character-focused strategy and pursuit.

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Charley Varrick (Walter Matthau) is a former stunt-pilot who makes his living robbing small banks in the American Southwest. His latest heist sees him unwittingly steal from the local mafia, setting a psychotic hit-man on his trail and unleashing a maelstrom of violence and destruction.
Directed by the great Don Siegel (Invasion of the Body Snatchers, Dirty Harry), Charley Varrick is one of the best thrillers of the 70s: action-packed, memorably lurid and gleefully unsentimental

Från IMDB:
A man, his wife and their friend stage a bloody bank robbery without realizing they are stealing from the Mob.