A Colorado man suspected of impersonating a public servant is under arrest, and now Boulder County authorities are searching for more victims. Investigators say the suspect, 50-year-old William Tidwell, was arrested on August 7th in Idaho Springs. According to the Boulder County Sheriff’s Office, the victim claims Tidwell offered her a ride to another trial while driving what she described as a search and rescue vehicle. While in the car, she alleges Tidwell sexually and physically assaulted her. Tidwell is booked into the Boulder County Jail and is charged with unlawful sexual contact by force, 2nd-degree assault, and impersonation of a public servant.