BRUNSWICK, Ga. -- Louis Santiago is now locked up in the Glynn County Detention Center along with the teen charged with murdering his 13-month-old son, Antonio.
The child's mother claims Santiago "went nuts" in the months following the baby's death and he violated a restraining order.
"He was throwing things through the window and terrorizing me, saying that I killed my baby and it should have been me," said Sherry West, the mother of the slain baby.
According to the state's forensic report obtained by Action News, Santiago had a small quantity of gunshot residue on his hands the day their son was killed in March.
Defense attorneys filed a court discovery motion claiming " Santiago, a convicted felon, had discharged a firearm at or about the same time that his son was shot."
But West insists she was walking her baby by herself when two teens, De'Marquise Elkins and Dominique Lang, tried to rob her at gunpoint on a Brunswick sidewalk, shot her in the leg and baby Antonio in his head.
"My baby was shot. I was shot near my head and of course there's going to be GSR (gunshot residue) everywhere," said West.
But if the baby's father was not at the murder scene, what could explain gunpowder on his hands?
West told Action News that she has an answer, "He may have touched my clothes in the hospital if there was GSR."
A conclusion from the state forensic report says, "This supports the possibility that (Santiago) discharged a firearm, was in close proximity to a firearm upon discharge, or came into contact with an item whose surface bears GSR."
Neither Santiago nor West is a murder suspect, according to police. The murder trial is scheduled to begin next month.