State Patrol identifies person involved in the accident.

ADAMS COUNTY, Colo. — A pedestrian, 22-year-old Zachary Castillo, was hit and killed by an Adams County Sheriff's patrol vehicle Thursday night.

The crash happened just after 7:45 p.m. in the southbound lanes of Federal Boulevard near 56th Avenue.

CSP said the deputy was responding to a call for service when Castillo ran out in front of his vehicle. Castillo was not crossing in a crosswalk or intersection.

The deputy did not have his lights and sirens on, according to troopers.

Investigators said the area where the pedestrian ran out from was not lit.

The deputy was not injured.

The CSP investigation into the crash is still ongoing.