Through the 1970s and 1980s, Mary Joe Frug was a well-respected and prominent law academic. As a part of the Critical Legal Studies movement, she looked to analyse the legal system from a feminist perspective. On the evening of April 4th 1991, the 49-year-old was walking to a convenience store in an upmarket neighbourhood in Cambridge, Massachusetts, when she was set upon and viciously stabbed to death. A man in his early twenties was seen fleeing from the scene but has never been identified. Investigators were baffled regarding a motive and could not determine if the slaying had been a random act or if Mary Joe had been specifically targeted. Several avenues continue to be explored by cold case detectives, including the possibility that the murder was connected to her work or private life.

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