News IRS whistleblowers lash out at federal officials in fiery Hunter Biden hearing: 5 takeaways July 19, 2023Phillip M. Bailey, USA TODAYComments Off on IRS whistleblowers lash out at federal officials in fiery Hunter Biden hearing: 5 takeaways Two whistleblowers, Greg Shapley and Joseph Ziegler, gave Congress their side of the story from the yearslong investigation into Hunter Biden.