Didn't someone write a book back in the '90's about the NFL, gambling and fixed games? I could have sworn I thumbed a copy at a BN or Borders bargain bin about 15 years ago. Named names and games and was 200-300 pages long. With hindsight, wish I'd ponied up for it.
As my father has long advocated, they should consider lie detector tests for the referees on at least a random basis each year. If nothing else, it would make for some additional entertainment.....