The city of Little Flock is investigating a report on a possible police impersonator. A female reported being suspicious when she was pulled over by an unmarked police type vehicle with a small blue flashing light. The man told the woman she was stopped for speeding. Little Flock police are sure that no officers made a stop around Woods Lane that night and advise residents to dial 9-1-1 if they are being stopped by a suspicious unmarked vehicle.