Jona Rechnitz , the key witness in the federal government's probe of corruption at the New York Police Department, is at risk of losing a block-long retail-and-office building he owns in Borough Park. Rechnitz's JSR Capital is in default on a $ 15 million loan the investor landed when he purchased the 16,000-square-foot Solomon Plaza at 5002 13th Avenue in April 2015 for $ 25 million, court records show.
