It is, in many ways, a quintessentially American unsolved murder mystery.

The victim was a rich and beautiful teenage girl found beaten to death with a golf club in a ritzy and supposedly safe Connecticut suburb. There was national news media frenzy followed by a stymied police investigation. And at the center of it all, there was murder suspect Michael Skakel, who also happens to be related to the fabled Kennedy family.

Eventually, there would be celebrity cameos from another high-profile murder investigation in this unfolding drama.

But 50 years after the 15-year-old was found dead beneath a tree in the backyard of her family home, there still is no definitive answer to the question: Who killed Martha Moxley?

Now, for the first time since his conviction in the killing of Moxley was

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