Liberty Lake police enlisted the help of Washington State Patrol investigators for a serious accident Saturday at Mission and Harvard Road. A Chrysler mini van driven by Allan R. Villars, 48, of Liberty Lake, was traveling north on Harvard Road. The van was struck on the passenger side by a GMB Sierra pickup truck that had exited from westbound I-90 at the Liberty Lake exit. The driver of the truck, identified as Clayton M. Trimble, 25, of Billings, apparently ran the stop sign. Both the driver of the mini van and his passenger, 47-year-old Gloria Villars, were injured. As of press time, Gloria Villars was in critical condition at a local hospital.