A 21-year-old St. Bernard man was killed in a motorcycle crash Thursday night in Violet, authorities said.

Greg Matlock Jr. was the passenger on a 2008 Honda motorcycle that was headed west on La. 46 with no lights on at about 9:15 p.m., State Police said Friday.

The motorcycle collided with a 2008 Dodge Ram truck that was headed the opposite direction and made a left turn onto Park River Drive. Both occupants of the motorcycle were thrown from the vehicle, authorities said.

Matlock and the motorcycle’s driver — who was not identified by State Police — were taken to Interim LSU Hospital. Matlock died from his injuries; the driver was in critical condition. Neither were wearing helmets at the time of the crash.

The driver of the truck, Jimmie Hutchinson Jr., 27, of Violet, voluntarily submitted to a breath and blood test, authorities said. Hutchinson’s toxicology results are pending, but driver impairment was not suspected.

The crash remains under investigation, and criminal charges are pending, authorities said.