Close Mercer High student gets perfect AP test scores KING 5's Dan Cassuto met a senior from Mercer Island High School who did something extraordinary. He got a perfect score on not one, but two AP exams. wsts2 5:41 PM. PDT October 27, 2016 More Stories Widespread power outages impact thousands Jan. 6, 2017, 1:31 p.m. Flu epidemic: state could soon step in to help Jan. 6, 2017, 6:37 a.m. What the Seahawks are saying about Golden Tate Jan. 6, 2017, 9:22 a.m.