The mistrust surrounding the injury definitely played a prominent role; Uncle Dennis isn't lying about that. It's difficult to point to the exact piece of hay that broke the camel's back but this was up there.
However, the downfall was actually many years in the making. There are layers to it.
The reason I don't say more is that to do so, I'd have to name names. There are like four or five prominent people right in the middle of the drama that media members don't really mention -- or only mention peripherally. Even if I drop vague hints, it'd take ST about five minutes to guess the names.
Everyone I've emailed with regarding further details has come to the same conclusion: not worth the consequences. The people involved would deny it and there's a good chance of being blackballed.
That said, I know some of the ESPN decision makers are now weighing whether to divulge more. With the Raptors in the Finals, they know it'd be a huge story that could be worth the blowback. I'd say there's a 50/50 chance they'll publish it in the next week.