A retired Braintree police detective accused of using department technology to track and harass his ex-girlfriend pleaded not guilty to a criminal harassment charge Friday.
Mark Sherrick was arraigned on the charge and released on his own recognizance.
Records obtained by 25 Investigates show Sherrick used the Braintree Police Department’s Flock camera system to search a license plate associated with his ex-girlfriend 1,049 times…