He has pulled over at least one person in Highland Township and now investigators want him off the streets before he targets someone else.
"We don't know his intentions," said Oakland County Sheriff Michael Bouchard.
The suspect pulled over a driver at Duck Lake and Livingston roads in Highland Township last Friday which has led to a $1,000 reward and four-year felony.
A sketch has been released of the 6-foot-tall man who was apparently driving a darker colored older model Crown Victoria with blue lights flashing and asked for the driver's license and registration.
"The baseball cap, not being in a uniform, the Crown Victoria, all those things add up," Bouchard said. "He had nothing that led to any official position other than the baseball cap."
The suspect then told the 23-year old driver that he was letting him off with a warning and took off.
The sheriff is now warning drivers to be more aware. Police want you to know that real officers will have an official ID or a badge.
"If they don't have (proper identification) you have every right to call the police," Bouchard said.
Police fear there could be more victims out there. If this happened to you or if you recognize the suspect you are asked to give the Oakland County Sheriffs Office a call at (248) 858-5000.