In Ohio, a mother of five has been arrested and charged with a 2012 murder. Erika Stephanko is accused of helping her ex-husband murder his former girlfriend.A Philadelphia woman is charged with abusing and murdering a four-year-old girl in her custody, after claiming the child was hurt in a fall.Finally, in Newark, New Jersey, an alleged serial killer is on trial for the murder of three women and the attempted murder of a fourth. The crimes all took place in the fall of 2016, and the alleged killer was caught after the family and friends of his final victim set a trap for him on social media.