Man punched 4-month-old baby to death after learning he wasn’t the child’s father.

According to police A Tennessee man brutality beat the crap out a 4-month-old boy to after finding out the kid was not his son.

33 year-old Jose Avila-Agurcia from Memphis was arrested and charged with 1st-degree murder for abusing Alexander Lizondro-Chacon after believing the infant was his.

The child died April 12 from blunt force trauma as a result of injuries to his ribs and had a fractured skull. Avila-Agurcia and the boy’s mother, Mercy Lizondro-Chacon, initially told police they didn’t know how Alexander was injured, a report said.

On Tuesday, she allegedly told investigators that Avila-Agurcia admitted to punching her son multiple times in the head after learning he was not his father. He was arrested hours later.