BlackJack S01E02 - Sweet Science

In 1992 a loving father was gunned down in front of his kids at their Saturday morning football game. The murder led to a series of underworld murders in what police assumed was a pay back killing. 12 years later, is it that the victim's young sons witnessed their father's brutal death that they turn to crime themselves, or was it that the police did nothing to solve his murder? Jack is faced with a dilemma when he suspects the boys are involved in a string of daring robberies. He races to close the unsolved killing before the boys seek their own retribution.