Suffolk County Police Seventh Squad detectives are investigating a single-vehicle crash that killed a motorcyclist in Upton.
On October 1, Donald Crispi was operating a 2014 three-wheeled Harley Davidson northbound on William Floyd Parkway, near Express Drive North, when he lost control of the motorcycle and struck a guardrail at approximately 5:45 p.m.
Crispi, 57, of Ridge, was airlifted by police helicopter to Stony Brook University Hospital, where he was pronounced dead. The motorcycle was impounded for a safety check. Detectives are asking anyone with information to contact the Seventh Squad at 631-852-8752.