I don't trust this US administration, or any other US government, nor the FBI in general (tho I'm a foreigner that don't live in the US, so I definitely ain't fully versed in some of yours intricacies for matters of "some bunch of weird stuff that doesn't feel worthy of wasting my time understanding It"), but I'd have this way more down to how much gambling been a problem not just in sports, but in society all over the globe.
And yeah, from what I read or heard, Chauncey issues doesn't look much NBA related.