如果开直升飞机的警察看你超速用无线电通知地面开车的警察把你抓住

上法庭你就可以要求那开直升飞机的警察来对证，如果只是那
地面开车的警察来了，你可以要求法官老爷把证词扔出去，因为这地面开车的警察并没有亲眼看见比超速. This is true in most states. But it may be different in states like Massachusstes which consider oridicnary traffic violationas civic matter so that hearsay rule does not apply