A state police trooper killed in a fatal crash on July 14 has been found at fault for causing the crash.

According to TribLive.com, investigators determined that Trooper Michael P. Stewart III, 26, of Unity, was at fault for the crash when his vehicle collided with a garbage truck at approximately 2:20 a.m.

Stewart was killed as a result of the collision. His passenger, Trooper Travis November, is still recovering.

Investigators said a number of factors played a role in the crash, including the police car's speed, the sight distance of the roadway and environmental factors that included a wet roadway and fog.

Stewart became the 98th member of the state police to be killed in the line of duty.