I don’t know about this instance, but in the general, it could be that the person is a complete fucking douche, and people are trying to stick it to them however they can. That might mean lying, blowing things out of proportion, or just slightly twisting the truth.
And once sharks smell blood, they swarm. One allegation will lead to another.
Again, I don’t know the situation here and refuse to pick a side. Guilt is for the courts to decide. But there’s plenty of people who will lie, cheat, and steal for money or fame.