In 2009, young mother Heather Strube is brazenly gunned down in a Target parking lot in Snellville, Georgia. The killer was wearing an obvious disguise, though it succeeded in hiding the killer's true identity. Witnesses say that the victim was confronted by a man before she was killed, but the discovery of forensic evidence and a powerful motive lead investigators to believe that Heather's killer was actually a woman - her ex-mother-in-law, Joanna Hayes.