A Pennsylvania dad fatally shot a teenage boy because he believed the 17-year-old got his daughter hooked on drugs, according to a criminal complaint.

Michael D’Biagio, 41, still had his gun when officers arrived at a New Castle pizza shop where 17-year-old employee Darren Jevcak had been shot dead in the parking lot, New Castle police said in a statement.

The dad admitted shooting Jevcak “five or six times” — saying it was because the teen “got his daughter on drugs or coke,” according to a criminal complaint obtained by the New Castle News.

D’Biagio told cops that his daughter had been sneaking out of the house to buy and smoke marijuana and was also using cocaine with Jevcak, according to the complaint.

After confronting his daughter, he called Jevcak, who told him he was at work — and the dad left his wife and daughter at a mall to go home to Beaver Falls and fetch his gun, the complaint says, then drove to the pizza shop and shot him multiple times when he saw him leave via a back door.

“He realized he had shot Jevcak in the arm and Jevcak went down to the ground,” the criminal complaint said, according to the News.

“D’Biagio said he shot Jevcak (again) so that he could put (him) out of his misery because (he) looked to be in shock.”

A neighbor said the dad remained at the scene, talking to other Scustie’s Pizza Shop employees who rushed out — and then lying down on the ground when cops arrived, according to the report.

He was arrested and is being charged with criminal homicide and aggravated assault, according to the police statement.

Jevcak was treated at the scene by McGonigle Ambulance Services, then taken to a hospital, where he was pronounced dead.