San Antonio police are hunting a gunman after an officer was executed in his patrol car as he was writing a traffic ticket on Sunday morning

The officer, 50-year-old Det. Benjamin Marconi, was shot after he pulled a driver over for an unspecified traffic infraction near police headquarters at around 11:45 a.m. local time, San Antonio Police Chief William McManus said during a news conference. While Marconi sat in his patrol car writing a ticket, a second vehicle pulled up behind him. The killer emerged from the second car and fired at Marconi through the passenger-side window of the squad car.

The gunman then reached inside the car and fired a second shot at Marconi before walking back to his car and fleeing the scene through the police department parking lot. Both shots fired at Marconi, a 20-year veteran, hit him in the head, McManus said.

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