OLYMPIA — The Washington State Patrol has made a preliminary decision to fire eight troopers who used fake diplomas to claim pay raises. Patrol spokesman Bob Calkins says Monday’s recommendation from an internal investigation is one step in the process. He says the troopers have the opportunity to meet with commanders this month to challenge facts and discuss discipline. A final decision is likely in September. The patrol investigation began after federal agents shut down a diploma mill in Spokane. KOMO-TV reports prosecutors decided not to file criminal charges. In addition to the eight, two other troopers who were accused have resigned. Troopers can boost their pay 2 percent by earning a two-year degree or 4 percent with a four-year degree.