WRITER OR MURDERER -- BRISCOE AND GREEN SEARCH FOR AN ANSWER --When a cab driver is stabbed to death and left under his taxi, Detectives Briscoe (Jerry Orbach) and Green (Jesse L. Martin) discover his last fare was a gifted writer and former convict with a violent streak. Matching the defendant in a battle of wits, A.D.A.'s Jack McCoy (Sam Waterston) and Serena Southerlyn (Elisabeth Rohm) attempt to prove the writer's guilt.