As a child, Richard ("Angel") Williams found life in Philadelphia a bleak affair. Angel's father deserted his family when the boy was a baby. His mother developed tuberculosis. The boy was shipped from one institution to another, and after stealing a car, ended up in the reformatory. When Angel was turned loose last year, at 17, he energetically set out to make a name for himself.
Before he left the "walls," Angel had settled on a guiding principle: the cops can't beat a well-organized gang. He rounded up a tough reform-school graduate named Frank Matyasevic to act as his...