Locarno was charged last month in connection with the fatal July 2010 shooting of an EMT during a dispute over parking spot outside a SoHo nightclub.
He was accused of telling the gunman to "Shoot! Shoot!" EMT Jason Green during the fight.
Although he didn't fire the fatal shots, Locarno was charged with manslaughter and gang assault.
Green had his own criminal history. He was under investigation for refusing to help a dying, pregnant employee at an Au Bon Pain in Brooklyn.
That victim, Eutisha Rennix, died after she did not receive medical help.