As a result of continuous cost reduction and device miniaturization, small UAVs are now more easily accessible to the public. Consequently, numerous new applications in the civilian and commercial domains have emerged. However, despite regulations, non-cooperative UAVs have started to abuse low-altitude airspace with potential security and safety problems. In this work, we present a new GNSS spoofing based counter- UAV defense system, which is able to flexibly, friendly, and remotely control a non-cooperating UAV to fly to a location we specify for capture. Our simulation and field study show the effectiveness of such a defense technique.