A 21-year-old Tennessee police cadet killed one person and wounded two others, including his ex-girlfriend, before he was shot dead by her brother on Friday night, Knoxville authorities said. Michael Little shot 18-year-old Ashley Womack in the leg and her mother, Rhonda, in the shoulder, and fatally wounded family friend Travis Wegener, cops say.Joshua Womack, Ashley's older brother, retrieved a rifle and then gunned down Little."I heard pop, pop and then I came outside and I heard some screaming," a neighbor told WBIR.Ashley Womack was taken to the University of Tennessee Medical Center and released, while her mother was in serious condition.