The Johnson Creek Police Department stopped employing Peter Chin in June, about a month after his drunk driving arrest. The Waukesha County District Attorney is investigating him for potential, related criminal charges. By Annie Pulley, THE BADGER PROJECT The Oconomowoc Police Department arrested Peter Chin, then a Johnson Creek cop, for drunk driving in May. The Waukesha County District Attorney’s Office noted that Chin is the subject of a crim…