I was going to ask what TSHTF means but I think I have worked it out now. I'm gonna use that one.
They were using a metal detector in the driveway area fairly close to the house. If she backed in that would roughly be where she parked and the masked guy would have been. They were definitely looking for something metal. So casings or actual bullets would be the logical thing. Could have been looking for a knife but she was not threatened with a knife. What do you think they were looking for? I do think it is significant they were using a metal detector if and could signify they now disbelieve it was a paintball gun. No metal would likely be coming from a paintball gun.