The next day, Dr. Osbourne conducted an autopsy and noted something alarming: Ellen Greenberg, a 27-year-old school teacher, had suffered 20 stab wounds, including multiple to the back of her neck.

Ellen Greenberg was found stabbed 20 times in the head, back, neck, and chest. Her death was ruled a suicide.

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The City of Philadelphia will reexamine the case of Ellen Greenberg, and her father believes investigators should be looking ...