When women kill, we can usually pinpoint why the killing occurred. There are a number of ways that women kill, and why. Many women may find themselves on the opposite end of an abusive partner, and the killing is preemptive to keep themselves alive. Other times, women kill for the same reason that men kill: jealousy, anger, frustration. Some women killing in a way that's so horrific that it gathers everyone's attention. Melanie McGuire is one such case, a woman whose crimes have gripped society and made her well known for the violence that she's inflicted on the world.