Michael Dunn takes the stand in his own defense during his trial in Jacksonville, Fla., Tuesday, Feb. 11, 2014. Dunn is charged with fatally shooting 17-year-old Jordan Davis after an argument over loud music outside a Jacksonville convenient store in 2012.

Bob Mack / The Florida Times-Union / AP

Michael Dunn takes the stand in his own defense during his trial in Jacksonville, Fla., Tuesday, Feb. 11, 2014. Dunn is charged with fatally shooting 17-year-old Jordan Davis after an argument over loud music outside a Jacksonville convenient store in 2012.