Short version.
Tim Donaghy was caught, by the feds, for influencing games as a ref. There was a pretty compelling amount of evidence indicating Scott Foster was working with him in this endeavor.
The NBA basically refused to work with the FBI.
Tim went to jail, Scott is still a ref to this day and the NBA ended up with close to 0 long term fallout.
Fun fact, a player very recently made the money hand symbol to Scott and got a 100K fine.