On the rainy Sunday evening of February 26, 2012, the lives of two individuals collided at the Retreat at Twin Lakes, a gated townhouse community in the Orlando suburb known as Sanford, Florida. George Zimmerman, a 28-year-old insurance underwriter and neighborhood watch volunteer, grew suspicious of Trayvon Martin, a 17-year-old high schooler who was temporarily staying at the home of his father's fiancee who lived in the small gated subdivision. Martin, unarmed and dressed in a dark-colored hooded sweatshirt, was walking home after going to a nearby 7-11 store to buy a can of Arizona Iced...