WILLIAMSTOWN, Mass. — A Pittsfield man died after his motorcycle struck a guardrail on Sunday afternoon. 

 

Sean Depson, 40, apparently lost control of the motorcycle he was driving on New Ashford Road around noon.

 

Depson was riding with others at the time and police say preliminary evidence indicates that speed was likely the leading factor to the collision.

 

According to a release from the Berkshire district attorney's office, Williamstown Police responded to the single-vehicle crash at about 12:17 p.m. A landing zone was initially set up at Mount Greylock Regional School for a medical helicopter, according to scanner reports, but then Northern Berkshire EMS transported Depson to Berkshire Medical Center in Pittsfield, where he succumbed to his injuries.

 

The State Police Berkshire Detective Unit assigned to the DA's office, Williamstown Police, and the State Police Collision Analysis and Reconstruction Section and Crime Scene Services are investigating the collision.