The SAT is the most widely used college admissions test in the United States with an annual volume of more than a million examinees. Its value has been debated widely, but empirically it is commonly found to predict first-year college grades (FYG) about as well as high school grades. Since selection to university is based, to some extent, on a student's performance on the SAT, it is erroneous to calculate the correlation between SAT and FYG and call it `validity.' Nevertheless, this correlation, based on a censored sample, is often used as a measure of the test's validity. There may be some reasonable comparative inferences that can be drawn from such a measure. Certainly, when the correlation between SAT and FYG was found to decline, it was cause for a flurry of investigations (Willingham, Lewis, Morgan & Ramist, 1990). In this paper we provide the facts for a mystery regarding the low and decreasing validity of the SAT at the University of Hawaii among students from Hawaiian secondary schools. Moreover, while we are unable to provide a complete solution, we do eliminate one onerous suspect and provide an evocative hint. (10pp.)