Dunn's attorney: 'It was self defense'

Published On: Nov 27 2012 10:56:19 PM EST   Updated On: Nov 27 2012 11:15:54 PM EST

A Brevard County man sits inside the Duval County jail, charged with killing a 17-year-old Jacksonville student after a dispute. Michael Dunn's attorney tells us police are missing a key piece of evidence.