GILBERT, Ariz. -- Gilbert police are looking for motorists pulled over by a 70-year-old suspected police impersonator.

Charles Grubbs was arrested Saturday, accused of pulling over a real Gilbert officer for speeding. Police said Grubbs was driving a black and white Honda Accord equipped with front and back flashing lights, a radio antenna and air horn.

The car Grubbs was using was so convincing that Officer David Bishop, who was on his way to work, thought for a moment that Grubbs was on the job, Gilbert police Sgt. Mark Marino said Monday.

"The officer wrote in his report, 'I thought I made a mistake and this appeared to be a legitimate law enforcement officer,"' Marino said.

He added that Bishop worried after he baited Grubbs to stop him by driving in excess of the speed limit.

But when Grubbs got out of his car, Bishop knew he wasn't legitimate.

"(Bishop) identified himself as an officer and this other guy went, 'Oops,"' Marino said of Grubbs.

For impersonating a police officer, Grubbs could be looking at felony charges, Marino said.

Grubbs was arrested on suspicion of impersonating a police officer and then released pending a review of the case by the Maricopa County Attorney's Office.

Grubbs reportedly said he didn't pull over Bishop, but he chased him down because he was going 65 mph in a 45 mph zone.

Grubbs couldn't be reached for further comment Monday.

Gilbert police said they have received reports of a car resembling a police unit seen around town.

There were no reports of anyone getting pulled over by someone impersonating an officer, though police asked anyone who may have been pulled over by Grubbs to contact them at 480-503-6500.