The Stunning Controversy

Their formal title is 'conducted-energy devices', but to the public they're stun-guns or tasers. 11,000 law enforcement agencies in the US use them and there is good evidence for the claim that they reduce the need for police officers to use lethal force. But there is an intensifying debate in the States as to whether tasers are really as safe as claimed. . Mark Whitaker reports from California and Arizona. Producer: Mark Whitaker A Square Dog Radio production for BBC Radio 4.