The father recognized his 22-year-old son from photos of the  suspected shooter that were released from authorities Thursday, leading the parent to confront his son when he returned home, sources said.

Robinson ‘fessed up to the horrific shooting when his dad asked if he pulled the trigger —  but originally refused to turn himself in to law enforcement, according to sources.

He told his father he’d rather kill himself, leading the parent to convince his son to speak with their youth minister, who also happens to be a US Marshal Service fugitive task force officer, sources said.

The minister then called a deputy with the federal agency, and the FBI took Robinson into custody, sources said.

Robinson has been arrested on aggravated murder charges. It’s believed he acted alone.