Concord – New Hampshire's attorney general has closed the investigation into whether an aide to presidential hopeful Mitt Romney illegally ran a license check on a reporter last spring.

Attorney General Kelly Ayotte says her office found no evidence that during the time in question, anyone had requested registration records for the car the reporter was most likely driving. She said there was no evidence of a crime.

She said New York Times Reporter Mark Leibovich refused to cooperate, except to say a Romney staffer told him they had run his license plate. In a story, he wrote that the staffer told him no one was permitted to follow Romney's car and that he was ordered to veer off.

The staffer was Jay Garrity, who has since resigned from the campaign. He still is being investigated on allegations of impersonating a police officer in Massachusetts.