Carl Smith was arrested late Friday night by the Wells Police Department on an active arrest warrant.
Penobscot Criminal Court has charged Smith with four counts of gross sexual assault.
The Maine State Police and Wells Police Department had the former chief under surveillance at a hotel but it was deemed unsafe to arrest him there as he was armed with a gun.
He was ultimately arrested at a felony traffic stop.
Smith served as a law enforcement officer for 18 years before leaving the service in 1988.
He has been transported for a mental evaluation and will be held at the York CountyJail without bail.
We'll have more when it becomes available.