A math teacher who was a former Jeopardy! contestant has been arrested as part of an ongoing investigation that “dates back to January 2024” into explicit images shared online, RadarOnline.com has learned. Winston Nguyen was cuffed “in front of a crowd of students” at St. Ann’s School in Brooklyn Heights last Thursday, eyewitnesses said. The ex-con was released on Saturday. RadarOnline.com should note that Nguyen wasn’t charged, but is being investigated by the Brooklyn District Attorney’s office. “We are awaiting a decision from the Brooklyn DA’s office regarding charges against Mr Nguyen,” h…