Maine State Police Trooper Robert Cejka of Brunswick escaped serious injury Wednesday afternoon, March 16, when his parked cruiser was struck from behind by a tractor-trailer on Route 133 in Livermore Falls.

According to a press release from Maine Department of Public Safety spokesperson Steve McCausland, Cejka, of Troop D, was taken to Central Maine Medical Center in Lewiston with minor injuries.

McCausland said Cejka was pinned inside his cruiser for more than an hour before being freed. He had stopped to assist motorist Amber Richards, 17, of Lewiston, when the crash took place. McCausland said Richards was outside her vehicle and saw the truck lose control. She ran into the woods to escape the impact, which drove the cruiser into Richard’s vehicle.

Cejka was returning from training with his K9, Charlie. Cejka and Charlie are on the Maine State Police bomb team. McCausland said Charlie was in the back seat of the cruiser and was not seriously injured. Charlie was taken to a veterinarian for a checkup.

MaCausland said the empty logging truck was owned and operated by Edwin Tillson of Sidney, who was not injured.

A team of troopers investigated the crash; a final decision had not been made Wednesday evening regarding enforcement action against Tillson.