Agreed. And I think they shut down any investigation for the obvious PR reasons. The NBA was taking a lot of heat for that ref and big money was at risk. In the end though, I don't believe a word Donaghy says. I'm sure there's some truth in some of the things he says but separating the truth from fiction is almost impossible given that he has a known agenda and advances it every chance he gets.
From what he said, it sounds like it was the officiating crew who made the decision, not a league-wide conspiracy. In this case.