She Had Cowboy Boots, Big Dreams and a Ski Trip Planned. Then Serial Killer Christopher Wilder Pulled a Gun On Her. This is Sheryl's story Sheryl Bonaventura dreamed of a career in modelling. I t was supposed to be the beginning of spring break. Eighteen-year-old Sheryl Bonaventura had spent the night at her best friend Krystal's house, the two of them staying up late, talking and laughing and planning their trip to Aspen. All Sheryl had to do the next morning was swing by Me