I wasn't aware he had ever stopped. I saw him mention Rainbow Coalition tax return shenanigans the other night, as part of the bigger picture, which is misuse of funds by tax-free charities, and the lack of accountability of these charities.
I think O'Reilly is doing a great job uncovering an injustice. I don't always agree with his politics, but at least he doesn't let politicians, charities, and others in the public eye, get away with not answering tough questions.