The son was not injured during the shooting, KHOU-TV reported. Brown said it was unclear whether the motive was robbery or whether the man had been targeted. Investigators do not have a clear description of the suspect or suspects, Brown said. Several neighbors who heard the gunshots reported seeing only a dark-colored sedan driving away from the scene. The investigation is ongoing. Get all the stories you need-to-know from the most powerful name in news delivered first thing every morning to your inbox Arrives Weekdays