A Belfast police officer was at fault in a crash that sent a motorcyclist to the hospital and closed Route 1 for three hours, according to an investigation by Waldo County Sheriff's Office.

Sgt. Matthew Cook was traveling southbound on Route 1 at the west end of Veterans' Memorial Bridge around 5:30 p.m. Aug. 24 when he saw a motorist "blow through" a stop sign at the foot of the northbound on ramp from High Street, according to an account given by Belfast Police Chief Michael McFadden shortly after the crash.

Cook reportedly activated his lights and started to make a U-turn over a narrow median when a motorcycle driven by Mark Belleisle, 56, of Swanville hit the side of his cruiser, which was perpendicular to the roadway. Belleisle had been traveling behind Cook.

Belleisle was flown by helicopter to Eastern Maine Medical Center with non-life-threatening injuries, including broken bones, according an earlier report from the Sheriff's Office. Cook had no reported injuries from the crash.

Speaking Sept. 15, Sheriff Jeffrey Trafton said the department worked with Belfast and State Police and screened the case through the district attorney's office.

"They decided in looking at the cruiser video that [Cook] didn't give the guy behind him any time to react," Trafton said. "The sergeant is definitely at fault. The driver of the motorcycle, there's no fault. He had no time to react."

Investigators concluded, however, that Cook did not violate any statute.

"That was a legal spot for the officer to make a U-turn there," Trafton said. "He just didn't see the motorcycle. There's no violation of statute there so the officer will not be charged with a crime, but he was at fault."

Belfast Police Chief McFadden could not immediately be reached for comment.