The chilling 911 call from the social worker outside of Josh Powell’s house as he killed his two sons inside has haunted everyone who has heard it, and now RadarOnline.com can exclusively reveal that the social worker could not have done anything else to save their lives.

Elizabeth Griffin-Hall, a contracted care worker for the Foster Care Resource Network, was taking 5-year-old Braden and 7-year-old Charles for a supervised visit with their dad at his home in Graham, Washington, on Sunday