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On January 26, 2011, at 6:30 p.m., Sam Goldberg frantically called 911.
"I just walked into my apartment; my fiancée's on the floor with blood everywhere," he told the dispatcher.
Then, more than two minutes later, he added a detail that would haunt the case for more than a decade: "A knife was sticking out of Ellen's chest."
When the operator pressed him for clarification, he insisted, "She stabbed herself!" before revising his claim: "She fell on a knife."
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.
She also had 11 bruises in various stages of healing. Osbourne initially ruled her death a homicide, writing that she had been "stabbed by another person".
Yet the Philadelphia police saw things differently, and approached the case as a suicide from the outset. Their reasoning? Ellen had been found alone in her locked apartment, with no sign of forced entry.
Watch: Josh and Sandee fight for justice for their daughter Ellen Greenberg. Post continues after video.
Investigators were so convinced of their theory that they released the scene without calling in the Crime Scene Unit. By the time they returned, the apartment had been professionally cleaned, erasing any potential evidence.
Following discussions with law enforcement, Dr. Osbourne reversed his initial conclusion and changed Ellen's manner of death to "suicide". But Ellen's parents, Josh and Sandee Greenberg, refused to accept it.