S2, Ep217 Sep. 2011A Race Against Time 7.1 (7) RateA popular teenager is murdered on the grounds of an elementary school. Her ruthless killer gets away. Years later and hundreds of miles away, another woman is viciously stabbed. In his haste to flee the scene, the attacker leaves behind a vital piece of evidence. When DNA links these two assaults, its up to homicide detective Molly Daul to track down this brutal killer before he strikes again.