Trayvon Martin's death and Florida's history of vigilante justice

Trayvon Martin
In this undated file family photo, Trayvon Martin poses for a family photo. College students around Florida rallied Monday, March 19, 2012, to demand the arrest of a white neighborhood watch captain who shot unarmed teen Martin last month, though authorities may be hamstrung by a state law that allows people to defend themselves with deadly force.
Anonymous/AP

For journalist Isabel Wilkerson, the shooting death of Florida teenager Trayvon Martin has historic resonance. She talks with Kerri Miller Thursday about the long history of vigilante justice and racial tension in Florida.