This is an LA Times Studios podcast.

Walk me through the key pieces of evidence here.

If you were making a presentation to a jury, what are the top three or four things you would point to?

The drawing.

It has a diagram, obviously, of Elizabeth short, with the markings on her in its title Elizabeth.

I'm talking to Rick Jackson.

He was a homicide detective for 36 years, both at the LAPD and at the San Mateo County Sheriff's Office.

He's talking about an eerie deathbed drawing left by Marvin Margolis depicting a topless woman

entitled Elizabeth. He thinks it provides an undeniable linkage between Margolis and Short's murder.

Knowing that Margolis had a relationship, at least for a short period of time,

in the proximity when she was killed, had threatened her make this drawing very important.

Beyond that, he sees it as proof that Margollis was also the Zodiac killer,

who terrorized

Northern California in the late 1960s.

The word zodiac kind of hidden under the dark shaded areas at the bottom of the picture,

that's crazy stuff.

Were you able to see the Zodiac word yourself? Yes, you can see it. It's not real clear,

but I've also seen photographs when it had been enhanced with filters and lighting,

so I can verify that based on what I saw, at least.

In June 1970, the Zodiac sent a letter containing two lines of encrypted writing to the San Francisco Chronicle.

The letter included a Phillips 66 service station roadmap.

On it, the Zodiac had marked a spot on the peak of Mount Diablo in Contra Costa County with his signature crossed circle emblem, which seemed to double as a compass.

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