In Saco, Maine on Saturday night, 33-year-old Joel Smith used a pump-action shotgun to kill his 35-year-old wife, Heather Smith, his 12-year-old stepson, and the couple's two biological children, a 7-year-old boy and a 4-year-old girl, before turning the gun on himself. The horrific scene was discovered on Sunday morning after a concerned family friend called the apartment complex where the Smith family lived and asked a maintenance worker to check on them.