I've got a distant cousin who's a cop. He came to a get-together in his squad car. I'd never seen one close-up and was surprised at all the RF equipment. The thing was bristling with more antennas than a rabid ham radio operator's car. It made me wonder what other emissions might come from a squad car that could be exploited even when his radar is off. I wish I'd had a spectrum analyzer and a few antennas.
Has anyone ever taken inventory of extraneous emissions from a police cars? There's got to be some L.O. leakage in all that RF hardware. I wonder if it'd be legal to scan for it.