GRAHAM, Texas (AP) — A Texas father accused of killing his two sons called 911 and confessed about 10 hours before the infant and toddler were found dead under their home, according to police documents released Friday. Graham police started investigating Gabriel Armandariz after one of his sisters called Wednesday and reported seeing a picture from his cell phone that showed the infant hanging by the neck, according to an arrest warrant affidavit obtained by The Associated Press. A man called 911 later that day and confessed to killing his children, and authorities verified the call came from Armandariz's cell phone, police said.