Six Bridges to Cross (1955)

Youth gang leader Jerry Florea is shot fleeing from a crime scene by rookie cop Ed Gallagher. Result: "he'll never have children of his own." Ed and Jerry develop a mutually beneficial friendship: Jerry gets the benefit of the doubt, Ed gets information that brings him rapid promotion. As years and jail terms go by, Ed's friendship with this likable rogue becomes strained, as hope for his reform dwindles. Can Jerry redeem himself in the end?