Christopher Nichols, 32, of Ashfield, died Saturday night, May 23, following a single car collision on Potters Road Extension in Charlemont.
Nichols was the only passenger in the car, which veered off the roadway into a ditch. The 29-year-old driver is being treated at Baystate Medical Center in Springfield and is expected to survive.
Charlemont police, Massachusetts State Police assigned to the Northwestern District Attorney's Office, MSP Crime Scene Services and MSP Collision Analysis and Reconstruction Section (CARS) responded.
The cause of the crash remains under investigation, including awaiting toxicology results from the Office of the Chief Medical Examiner.