Choice of Evils

S16 E15: After a teenaged runaway is found shot in the chest, Detectives Fontana (Dennis Farina) and Green (Jesse L. Martin) begin to suspect his upstate "soccer mom," who admits she killed her vicious son out of fear that he would follow in his criminal father's footsteps. As ADAs McCoy (Sam Waterston) and Borgia (Annie Parisse) charge her with second-degree murder, the defendant's attorney claims that her client did society a favor by ending her son's life prematurely -- and new video evidence might sway a jury. S. Epatha Merkerson and Fred Dalton Thompson also star.