The teen has been identified as Vincent “Vinny” Cammarata, 17, who passed away from injuries suffered during the crash.
The letter says seven other current and former Watertown students were in the car during the incident.
Related Content: 1 teen killed, several others injured in car crash
Counseling and grief support is being offered at Watertown High School on Monday from 12 noon until 2 p.m. in the high school’s media center.
Web Extra: 9-1-1 call reporting the Plymouth crash
The cause of the crash remains under investigation.