Man kills family because the devil pushed him

A 32-year old man killed his wife and five children in Haiti by stabbing and slashing their throats. Why? Because he wanted to go to heaven, but knew that just killing himself would preclude such a happy outcome. Oh, and the devil made him do it. Through the person of his stepmother, who worships the devil, or a spirit, or "whatever." The youngest child was 11 months old, the oldest was 9 years of age.