In L.A., murder often becomes myth.

No other place seems to elevate its killings and killers the way Los Angeles does.

Perched at the top of this dark pantheon of murder in the city of angels sits Elizabeth's short,

better known as the Black Dahlia, the girl who was cut cleanly in two.

Her unsolved murder refuses, even after almost 80 years,

to diminish in the public imagination.

Over the decades, Short's horrific demise has sparked the imagination

of many in the fields of entertainment and law enforcement.

Be it fiction or documentary, there are uncounted versions of the story in book and screened form,

and it's a competitive market with champions of one suspect tirelessly sniping at those of others.

There has also been no shortage of real-life suspects brought forth.

Calling a cold case is a bit ironic when so many investigators,

amateur and professional alike, have worked the bones of Elizabeth Short since the day her body was found in 1947.

Mitzi Roberts, who ran the Los Angeles Police Department's cold case unit until her retirement

last year, says that not a week went by that she didn't field inquiries and unsolicited

solutions to the mystery of who killed Elizabeth Short.

I mean, I would get correspondence from people via email or phone calls every week, for sure, every week.

None of the theories or suspects held promise.

Most were rejected by known facts of the case before the phone call was even over.

In Robert's view, the case would never be solved,

and there would be no justice for Elizabeth Short.

That is, until she met Alex Baver,

...