The case is drawing parallels to the case of Trayvon Martin . Kenneth Chamberlain accidentally set off a medical alert system , his family says . Police say they arrested Chamberlain after he came at them with a knife . The family says video and audio evidence prove he was unarmed .
The case is drawing parallels to the shooting of Trayvon Martin . Kenneth Chamberlain accidentally set off a medical alert device , his family says . Police say they shot Chamberlain after he came at them with a knife . The family says video and audio recordings prove he was unarmed .