An 18-year-old University High School student was arrested late Friday after allegedly writing bomb threats in the school’s bathrooms three times in April, causing the school to be evacuated twice. Calynn E. Moore is facing three felony counts of threats to bomb or injure property. Deputies believe she is responsible for threats found in two different women’s bathrooms on April 13, 14 and 20. Moore was arrested after she arrived at the Spokane Valley Police Precinct Friday for an interview with School Resource Deputy Jeff Duncan. Spokane County Sheriff’s Office spokesman Deputy Mark Gregory said video surveillance in the hallway outside the restrooms helped solve the case. “It really was U-High staff and district staff and Deputy Duncan working together,” he said. An investigation into whomever sent threatening emails to the school on April 1 and 3 is continuing.