State Police are investigating a fatal crash that claimed the life of a Houma Police Department patrolman in Terrebonne Parish Thursday morning. The crash happened on LA 648, also known as Percy Brown Road, just east of the intersection with Audubon Avenue in Terrebonne Parish. Austin Bush, 21, of Houma, was killed. State police say Bush was traveling west on LA Hwy 648 in a fully-marked Houma Police Department 2010 Ford Crown Victoria. For reasons still under investigation, the vehicle struck a log near the westbound fog line of LA Hwy 648, according to the State police report. State police say the impact caused the Ford to travel across the eastbound lane and into a drainage basin where it became fully submerged in water.Bush, who was properly restrained at the time of the crash, was removed from the vehicle by responding officers. He was transported to Thibodaux Regional Medical Center where he was pronounced dead shortly after arrival, according to state police. A routine toxicology sample will be collected and submitted for analysis. This crash remains under investigation.