The ones you see on TV are the ones they catch. The actual odds of getting away from them are more like 50-50 nationwide, but the Popos aren't keen on advertising that fact. Their odds are vastly improved where they have the helos aloft, FLIR, etc., which tells you that where they don't have those kind of assets, there is considerably better than an even chance of eluding them. Woe betide he who tries and fails, of course.