NBC NATIONAL NEWS — Multiple 911 calls placed minutes after Josh Powell killed his two young sons and then lit his Graham home on fire were released Tuesday.
Among the calls are the social worker who escorted the boys to Powell's home, Powell's sister, his attorney, his boss, and neighbors who saw the flames.
It was the social worker who brought Charlie, 5, and Braden, 7, to the house for their court-ordered supervised visit who called 911 first. She called as soon as she said Powell took the children and shut her out of the house.
"Nothing like this has ever happened before, I'm really shocked, I can hear one of the kids crying," the woman said. "This is the craziest thing, he looked right at me and closed the door."
Concerned that the children might be in a life-threatening situation, the woman also told dispatchers she smelled gas coming from the house. After the house exploded in flames, she called again.
"He blew up the house and the kids!" she cried. "He slammed the door in my face!"
Meanwhile, Pierce County authorities on Tuesday served a search warrant at a storage unit belonging to Josh Powell.
The storage unit is located somewhere near Sumner, but the exact details are not known yet.
Police from West Valley, Utah, said the search warrant at the storage unit has nothing to do with the disappearance of Susan Powell, Josh's wife who went missing in December, 2009.
Police called the deaths of Charlie and Braden a "deliberate plan" and a tragedy.