PHILADELPHIA (WPVI) -- A shocking story turned tragic mystery in Philadelphia's Manayunk neighborhood is now the focus of a new Hulu docuseries.

Ellen Greenberg 's death was ruled a suicide, but her parents have long questioned that conclusion. Now, they're telling her story in a new light.

The three-part series, "Death in Apartment 603: What Happened to Ellen Greenberg," features never-before-seen interviews with family and friends, along with crime scene photos and autopsy analysis.

"The story carried itself to this point. There's so many twists and turns, lies and falsehoods," said Ellen's father, Josh Greenberg.

Ellen, a 27-year-old Philadelphia school teacher, was found dead in her apartment in 2011 with more than 20 stab wounds. Her death was initially ruled a homicide, b

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