Byron York recounts the tale, here:
The short version is: In 2004, Jared Kushner's father Charles, a real estate magnate in New Jersey and New York, pleaded guilty to a tax fraud scheme in which he claimed hundreds of thousands of dollars in phony deductions for office expenses at the partnerships he created to manage the apartment buildings he owned. Kushner, a major donor to the Democratic Party, also pleaded guilty to fraudulently making hundreds of thousands of dollars in campaign contributions in the names of employees and associates who didn't know their names were being used. Finally, Kushner pleaded guilty to retaliating against a cooperating witness in the case — his sister. He did so by setting a trap in which he hired a prostitute to lure his sister's husband into a sexual encounter in a New Jersey hotel, where the action was secretly photographed and videotaped. Kushner sent the pictures and tape to his sister as revenge, apparently motivated by Kushner's belief that she and her husband were helping U.S. Attorney Christie and his prosecutors. ... [I]n a 2014 interview with the New York real estate publication The Real Deal, Jared called his father's treatment "obviously unjust" and said the experience had soured him on an earlier ambition to become a prosecutor. "If you're convicting murderers, it's one thing," Jared said. "It's often fairly clear. When you get into things like white-collar crime, there are often a lot of nuances. Seeing my father's situation, I felt what happened was obviously unjust in terms of the way they pursued him."