A man accused of holding a machete to the neck of a Colorado Springs pizza store worker during a robbery has pleaded guilty to robbing the shop. Howard York agreed to a 17-year prison term in exchange for his plea Monday. The shop was robbed in late January. In March, about a month after York was arrested in the robbery, a person working in a mobile home park in El Paso County found the body of 32-year-old Crysta Chisholm under a trailer where York had lived. The body was discovered as a workman was removing skirting from the trailer to get it ready to be moved. Sheriff's officials are still investigating Chisholm's death. No charges have been filed in that case.