The FBI and officials are now reporting the two boys who died last Sunday when their father blew up their Graham, WA home perhaps implicated their father as the person who murdered their mother.

Josh Powell, who Sunday blew up his home killing himself and his 5- and 7-year-old sons during what was supposed to be a supervised visit,  may have killed his wife Susan several years ago.

This is according to Fox News. The story began when the Powell family lived in West Valley City, Utah when in December, 2009, 28-year-old Susan Powell failed to show up for work.

She is presumed dead but her body was never found. Josh Powell was identified as a person of interest, but never arrested. Powell and his sons moved to Graham, WA to be closer to his father Steve, but deteriorating family conditions led to custody of the two boys being given to maternal grandparents Chuck and Judy Cox.

According to officials, the boys began to talk more about the disappearance of their mother. Their father had said he took them camping that December, and when they returned home, the mother was gone. The boys reportedly told the grandparents the following (From Fox News):

"The oldest boy talked about that they went camping and that Mommy was in the trunk. Mom and Dad got out of the car and Mom disappeared."

Sunday, the boys were to be given a supervised visitation with their father. They ran from the social worker's car to see their dad; he let them in and locked the door. The social worker called authorities, telling them she also smelled gas. Shortly after, the house exploded in flames shaking neighborhood houses and killing the father and the two boys. The investigation continues into this shocking story.