BOSTON (AP) — Boston police arrested a man they say posed as a police officer and attempted to kidnap and rape a woman over the weekend.

Charles Singleton, 51, of Boston, claimed to be a police officer when he offered a ride to a woman he’d met at a social gathering during the early morning hours on Saturday, according to police.

Instead, he drove the woman a short distance, pulled out a gun and ordered her to walk out into a dark field where he groped her and threatened to kill her if she didn’t comply with his instructions, police said.

When the woman began to scream, Singleton assaulted her, took her purse and cell phone and fled.

Officers arriving say they located Singleton near his vehicle and recovered the woman’s personal items as well as a gun equipped with a laser sight that had been discarded nearby.

Singleton is due to be arraigned in Dorchester District Court on Monday on a range charges, including assault with intent to rape, kidnapping, indecent assault and battery and unlawful possession of a firearm, according to police.

It couldn’t be immediately determined if he has a lawyer.