Something else I just thought of....
ive heard the SAME answer from EVERY teacher that I've asked this question to, "is it true that a teacher never forgets a students name"?
every answer has been practically the same... They may not always remember the name, but they always know the face.
so why after all these years have we been going after the 500 or so students that graduated in 1975?
woukdnt it have made more sense for the police to have the principle, secretary janitor, teachers, coaches, ect look at the princess blue sketch than to have the whole school look? Even in 1990, im sure there were still a handful of teachers there that were there in 1975.
Maybe be we've gone in the wrong direction. Maybe going after the faculty for answers would have been a better solution. Kids may not know each and every perdon personally in their grade. Especially with such a large class.
BUT... Faculty usually know everyone!!