BARNSTABLE, Mass. (AP) -- A Barnstable police officer is under investigation by his own department after he was charged twice in Vermont with drunken driving.

Chief Paul MacDonald says Officer Scott Kynoch was arrested on May 26 in South Burlington, Vt., and charged with operating under the influence. His lawyer entered a not guilty plea on his behalf at his arraignment.

MacDonald tells the Cape Cod Times that Kynoch was arrested by Vermont State Police in Williston, Vt., on July 13 on a driving under the influence charge. He has not yet been arraigned in that case.

The 48-year-old Kynoch is a 23-year veteran.

He's been assigned to desk duty pending the results of the department's internal affairs investigation for allegedly violating ethics and conduct standards.

Kynoch could not be reached for comment.