The parents of 13-month-old Antonio Santiago, who was shot in his stroller by 2 teens in Brunswick, GA. in March, had gunshot residue on them the day their son was killed. The new details emerged in the state’s forensic report obtained by CBS affiliate WTEV. De’Marquise Elkins and Dominique Lang were arrested shortly after the baby was killed.

The teens are suspected of shooting Antonio in the head while trying to rob the infant’s mother, Sherry West, who was also shot in the leg. West said the fact that she was shot would explain the gunshot residue on her. She insisted the baby’s father, Louis Santiago, was not at the scene of the shooting. “My baby was shot. I was shot near my head and of course there’s going to be GSR (gunshot residue) everywhere,” said West.

“He may have touched my clothes in the hospital if there was GSR.”

Defense attorneys for the 2 teenage suspects 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.”

According to WTEV, Louis Santiago is currently in jail on charges of violating a restraining order and aggravated stalking.

West claims Santiago “went nuts” in the months following their son’s murder, according to WTEV.

“He was throwing things through the window and terrorizing me, saying that I killed my baby and it should have been me,” West told the station.

Police have not named West or Louis Santiago as suspects in the shooting death of their infant. The trial is scheduled to begin next month.

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