Two Skamania County residents were arrested late last week after an intensive nine-month investigation into the trafficking of heroin and prescription medications. Skamania County Undersheriff Dave Cox says 25-year-old Jared Hinzman of North Bonneville was booked into jail on three counts of delivery of controlled substance, and 53-year-old Katherine Gregory of Stevenson faces four counts of that charge. Cox says the investigation continues, and more arrests will be forthcoming in the next few weeks.