On February 16th, 2002, Kenya Nicole Cook opened the front door of her aunt’s home, in Tacoma, Washington, to find a teenage boy standing outside. The pair chatted for a moment before the teenager produced a gun, and subsequently shot Kenya, a 21-year-old cashier.Just over a month later, on March 19th, 60-year-old Jerry Taylor was killed after a single bullet fired from long range hit him while he practised at a golf course in Tucson, Arizona. Over the course of the next four months, two othe...