PORTLAND — Investigators found an “incredible amount of pills” to treat anxiety and depression at the home of a volunteer high school wrestling coach who last month killed himself, the teenage son of a woman he had dated and that woman’s boyfriend in rural eastern Oregon.Jason Huston also shot the woman, Andria Bye, the mother of the 14-year-old. She survived.Police say they don’t have a clear-cut motive for the Aug. 18 shootings. Hermiston Police Chief Jason Edmiston said pills found at Huston’s home appeared to be prescribed through the VA. Police have been told that Huston served during the first Gulf War but have not confirmed his military service.“We are navigating the red tape of the VA to try and glean additional information and we have no timeline on when that may take place,” Edmiston said Wednesday.Edmiston also released a timeline of events that matches up with what was described after the shootings that left James “JJ” Hurtado, 14, and Kenneth Valdez, a fellow volunteer wrestling coach at Hermiston High School, another volunteer wrestling coach, dead in separate places.Edmiston said Huston picked up Hurtado about 10 a.m. at a grandparent’s house. He then drove him to a spot near the Umatilla River and killed Hurtado with one round from a handgun. He then drove toward the home of Valdez. He parked at an apartment building about 11 a.m. and walked 100 yards to the home.