A Butler, Pennsylvania father has been jailed after fracturing his seven-week-old son’s skull by bashing the baby’s head into a wall in June because he was frustrated, police said.

Tyler Duddy, 25, had sole custody of the child and is now in the Butler County Jail under $75,000 bond and was charged with aggravated assault and endangering the welfare of children, CBS Pittsburgh reports.

Family told CBS Pittsburgh that the baby, Callen, suffered a skull fracture, brain bleeding and facial bruising and is recovering. He may suffer permanent brain damage.