A motorbike thief was caught by a quick-thinking cop who leapt from his unmarked patrol car while the rider was stuck in traffic. David Hart was off-guard as West Midlands officer PC Mitchell Darby grabbed and arrested him in Bordesley Green, in May. The KSR Moto GRS 125 had flagged-up as being stolen while PC Darby, from the roads policing unit, and a colleague were on routine traffic duties.