Federal investigators reportedly are looking into the 2011 death of Ellen Greenberg, whose fiancé found the Philadelphia teacher with more than 20 stab wounds in her apartment. The ruling of suicide has never satisfied Greenberg’s parents — and former FBI Special Agent Jennifer Coffindaffer can understand why. “There was something that went on in this that just doesn’t sit right,” the NewsNation law and justice contributor says. #Crime #EllenGreenberg "NewsNation Prime" is America’s source for unbiased news offering a full range of perspectives from across the U.S. Weekends starting at 7p/6C. #Prime NewsNation is your source for fact-based, unbiased news for all Americans. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij