Miles Michael Lacy, 22, is charged with impersonating a public servant.
Court documents state that on January 27, an off-duty Houston police officer was driving with his family on the Katy Freeway when he saw a driver in a silver BMW with flashing red and blue emergency lights pull over three vehicles before trying to stop the off-duty officer himself.
The officer said he did not pull over because he knew that undercover police officers do not pull over drivers in unmarked vehicles. Instead, they call for assistance from a marked police unit.
The off-duty officer followed the BMW, looked at the driver, noted the license plate number and called HPD dispatch.
With the license plate information, an investigator tracked down Lacy, who admitted driving the car on the day of the incident but refused to answer any other questions on the advice of his attorney.
Lacy is not a peace officer, nor is he a registered security guard with TXDPS Private Security Bureau.
Bail for the felony charge has been set at $5,000.