Family Friend

S16 E12: When a Mob accountant is slain and his wife is severely wounded, Detectives Fontana (Dennis Farina) and Green (Jesse L. Martin) arrest a common street thug who is later found not guilty because of the victim's poor testimony. When the freed slayer is later killed by an ex-cop and close family friend of the victim's, A.D.A. McCoy (Sam Waterston) faces a political powderkeg when the corrupt officer seeks to avoid prosecution by threatening to expose tainted evidence from dozens of previous cases that would free convicted murderers. Annie Parisse, S. Epatha Merkerson and Fred Dalton Thompson also star.