BREWER – State police troopers used a police dog Monday to help apprehend a woman who pulled out a large hunting knife after she had been stopped for speeding on Interstate 395 in Brewer.

The woman, Samantha McGuire, no age available and believed to be from Bangor, was taken by ambulance to Eastern Maine Medical Center in Bangor for evaluation and to be checked for injuries.

The police dog, Boris, bit her on the back of her right hip, although the bite barely broke the skin, Sgt. Mark Brooks of the Maine State Police said.

McGuire, dressed in short black pants, a purple shirt, a dark baseball cap and sandals, appeared to be walking normally as she was escorted across the eastbound lane of I-395 to an ambulance waiting in the westbound lane.

Brooks said the dog was used only after the woman refused repeated requests by troopers to drop the knife. He said the woman was startled after the dog bit her and that moment gave troopers enough time to get the knife from her.

Trooper Seth Edwards was completing another stop of a motorist on I-395 near Green Point Road when the SUV driven by McGuire passed him at a high rate of speed. Edwards followed and using radar determined she was going 69 mph in a 55-mph zone.

McGuire pulled over about 3:45 p.m. in the lane headed toward the offramp just before the Route 1A overpass. She got out of the SUV and had the knife with her, police said.

Brooks said the woman wasn’t threatening police or herself with the knife, but she refused to drop it and wouldn’t talk to the troopers.

Edwards and Troopers Darren Foster and David Yankowsky tried to de-escalate the situation and asked the woman repeatedly to drop the knife, he said. When she didn’t, police sent in Boris.

The woman is expected to be issued a citation for speeding, but other charges will be up to the Penobscot County District Attorney’s Office to determine, Brooks said.

Police from Brewer and Holden and a deputy from the Penobscot County Sheriff’s Department assisted state police during the incident.