Robber silenced by own voice due to sharp-minded PC

 A vicious robber who slashed the face of a taxi driver to steal his earnings has been jailed - after being caught by a sharp-thinking West Midlands Police officer who recognised her voice!Alert PC Andy Cleaver managed to identify Jessica Buchanan after hearing her speak; recalling the twang caught on a dash camera during the attack off New Birmingham Road, Tividale, weeks beforehand.The Sandwell neighbourhood officer had been visiting nearby flats - where Buchanan was staying - on July 4 l