IRS whistleblower speaks out about Hunter Biden probe

Joseph Ziegler, a 13-year IRS special agent with the Criminal Investigation Division, speaks with CNN's Jake Tapper about his testimony before the House Oversight Committee during which he said he witnessed federal prosecutors deviating from normal procedures, and echoed fellow whistleblower Gary Shapley’s claims that IRS investigators recommended charging Hunter Biden with far more serious crimes than what the president’s son has agreed to plead guilty to.