(Lacey, WA)  --  Thurston County, Washington authorities say they've made an arrest in connection with a triple homicide.  The sheriff's office says 24-year-old Dugan Lawton is believed to have shot two men and a woman to death at a travel trailer outside a Lacey-area home last week.  Another man was wounded.  Investigators say methamphetamine, heroin, guns, and several thousand dollars in cash were found in the trailer.  Bail for Lawton is set at five-million dollars.