Kelsey Shannon and Alex Pacheco The 18-year-old Broomfield immigrant accused in the slaying of a 13-year-old white girl admitted to several friends that he killed her, according to evidence laid out in a preliminary hearing Wednesday in Boulder. Alexander Paul Pacheco is charged with first-degree murder in the October 2008 slaying of Kelsey Shannon. Her badly decomposed remains were found in a Broomfield...