ABC 4 News talked to Kirk Graves, Josh Powell's brother-in-law, about the explosion that killed Charlie, 7, and Braden, 5.
Graves said the day was like any other Sunday. He was in his office and his wife was sleeping when the phone rang with news of the deadly explosion.
Graves said his wife Jennifer took the call and said, "She came into the room that I was in and she was incoherent and it took me a while to figure out what she was talking about."
Police said a case worker dropped off Josh Powell's sons at the home Sunday afternoon for a supervised visit, the source said. Powell then shut the door on the caseworker and locked it.
The case worker then reported smelling gas fumes, and then an explosion ripped through the home, killing all three.
Graves believes a lot of people feel guilty for not doing more to keep this situation from happen but thinks the guilt is misplaced. He said, "I think there are a lot of people that blame themselves, but this is Josh. He did this and he’s the only one to bear the brunt of it."
Graves continued, "I don’t think anyone had any indications at all that this was in the works that Josh could go this far with it."
Kirk Graves broke the news to Josh's mother. When asked how she took the news, he said, "She is not doing well."
Susan's family hoped they would be able to permanently welcome Charlie and Braden into the family.
Graves said, "We thought of Charlie and Braden as hopefully someday being our kids and that’s probably the hardest part knowing that dream is gone."
Stay with ABC 4 and ABC4.com for more on this developing story. For more on the case, go to the Susan Powell section of ABC4.com.