NORWICH, Vt. — A Lebanon man was high on marijuana when he caused the fatal, single-car accident on I-91 that took the life of a Vermont man, according to police.

Keith Cushman, 34, of Lebanon, was charged with grossly careless and negligent operation with death resulting after toxicology test results came back showing the presence of cannabis in Cushman’s blood at the time of the Sept. 3 crash, according to a Vermont State Police statement.

The crash left Theodore Haley, 37, of Hartford, Vt., dead, and Michelle Hayard, 37, also from Hartford, Vt., with serious head and neck injuries.

Police and ambulance services were called to the highway on the afternoon of Sept. 3. The highway runs along the Vermont and New Hampshire border for much of the Upper Valley region.

Police say Cushman hit the median of the highway as he was driving his 2006 GMC Sierra truck, hitting several rock ledges. The truck overturned during the accident, and Haley was thrown from the vehicle in the crash. When first responders got to the scene, they found Haley pinned under the truck, according to police.

Both Hayward and Cushman were taken to Dartmouth-Hitchcock Medical Center in Lebanon to be treated for their injuries. Cushman reportedly sustained minor cuts in the crash. He was arrested and charged Tuesday and processed at the Royalton Barracks. He’s scheduled to be arraigned in Windsor (Vt.) Superior Court on Feb. 19.