***SPOILERS***It's when young punk Andy McGuire, Andy Robinson, gunned down mob runner Duke Barrett, played by son of Tarzan Johnny Weissmuller Jr, and Officer Fletcher, Victor Hall, who just came on the scene it became apparent that it was not just a crime for Andy getting the $250,000.00 that Barrette was carrying but in getting revenge against his dad big time mob boss Frank McGuire, Tim O'Connor, whom Andy always has it in for. With Det. Let. Steve Stone, Karl Malden, and his partner Inspector Don Robbins, Richard Hatch, looking for the elusive Andy McGuire he ends up making a deal with the local D.A for immunity, for two murders, by ratting out his dad's control of his criminal empire in the city of San Francisco.
Not quite being able to exactly figure out what young Andy is up to both Det. Let. Stone and Inspector Robbins go along with the plan to keep Andy breathing, while under 24 hour around the clock police protection, until Stone realizes that there's something smells in the D.A's office and it not the stale coffee that he's been drinking there. There's also the D.A unprofessional way of dealing with Andy in that he murdered two people, one a cop, yet letting him get away Scot-free with his crime by implicating his father in crimes that had nothing at all to do with it! Or did it!
***SPOILERS*** As it turned out the murder robbery of Barrett was planned by mob boss Frank McGuire himself in paying off his bookies for losses at the racetrack and he used Andy as a stooge, in taking the rap, for doing it. It's now Andy, in ditching the stolen $250,000,00, who has all the cards and is using them against his double-dealing dad. That by setting him up in knowing where the stolen cash is hidden, in an L.A Airport locker, that he giving him all the rope, a one way ticket to the big house, to hang himself with.