Kushner was a multimillionaire real estate executive and top Democratic donor when he was sentenced in 2005 to two years in federal prison after he pleaded guilty to 18 counts, including tax evasion and making illegal campaign contributions. Once Kushner discovered his brother-in-law and former business partner was assisting federal authorities in their investigation, he set out for revenge (and, as prosecutors would argue, witness intimidation).
The wealthy New York real estate magnate hired a prostitute to seduce his brother-in-law in a New Jersey motel, arranging to have the encounter recorded with a hidden camera. Then, he showed the video to his brother-in-law's wife: Kushner's sister.
link to People article