S19, E1: Stockbroker Todd Hauser (guest star Graham Outerbridge) dies in an emergency room after experiencing stomach pains, which was thought to be the result of what he ate for lunch. Massive internal bruising is determined as the cause of death leading detectives Lupo (Jeremy Sisto) and Bernard (Anthony Bernard) to uncover the victim's involvement in organized street fighting. The detectives struggle to find a helpful witness and usable evidence. When Hauser's street fighting opponent is let off with a lesser sentence than the victim's family hoped for, his brother and friends take matters into their own hands. With a new set of deaths and a new twist to the case DA McCoy (Sam Waterston), with re-election on the line and nowhere left to turn, makes a bold move to settle this case. Epatha Merkerson, Linus Roache and Alana De La Garza also star.