The office of New Hampshire's attorney general says a state trooper involved in the videotaped beating of a man after a 50-mile car chase through Massachusetts and New Hampshire is expected to plead guilty to several charges related to the incident.

Andrew Monaco, 31, of the New Hampshire State Police, was arrested in July along with Joseph Flynn, 32, of the Massachusetts State Police, on charges stemming from their use of force in the arrest of Richard Simone Jr. on May 11.

Video caught by a TV news helicopter appears to show Simone surrendering and officers then punching him repeatedly.

The office of New Hampshire Attorney General Joseph A. Foster says Monaco is expected to plead guilty Thursday to three counts of simple assault.

Monaco's attorney, Eric Wilson, couldn't be reached for comment.