(Kelso, WA)  --  Police in southwestern Washington say they've made an arrest in connection to the deadly shooting of a convenience store worker during an armed robbery.  Police arrested 19-year-old D'Anthony Leslie Williams last night in Camas.  He's accused of shooting and killing 30-year-old Kayla Chapman while robbing the Holt's Quik Check in Kelso Tuesday morning.  Chapman was the only employee in the store at the time of the robbery.