MGN Online

Published: Nov 01, 2013 11:36 AM EDT

COLLIER COUNTY, Fla.- The Florida Highway Patrol is reporting 18-year-old Timothy Unsderfer was critically injured after he was involved in an accident on Collier Boulevard, near Capri Boulevard.

Troopers said the teenager was speeding when he lost control and hit a tree. He was not wearing a seatbelt.

A teenage passenger, who suffered minor injuries, was also in the truck.