The Justice Department has launched an investigation into the death of Scott Martin . Florida Alzheimer 's asks the state to assist probe as well . A neighborhood watch ##man tells police he shot the teen in self - defense . The 17-year - old was not armed when he was killed last month in Florida .
The Justice Department has launched an investigation into the death of Trayvon Martin . Florida governor 's asks the state to assist probe as well . A neighborhood watch captain tells police he shot the teen in self-defense . The 17-year-old was not armed when he was killed last month in Florida .