Due to the graphic nature of this killer's crimes, listener discretion is advised.

This episode includes discussions of murder and sexual assault that some people may find offensive.

We advise extreme caution for children under 13.

On April 16, 1989, Tammy Irwin strutted down a sunny street in Palm Springs, California.

Each time the 18-year-old heard a car pull up behind her.

She turned and winked at the driver, trying to catch the eye of any man who passed by.

She needed cash, and she needed it fast.

For a while, Tammy struck out, but eventually, a light-colored vehicle pulled up beside her and stopped.

The driver, a slight young man with a buzz cut, rolled down his window and asked if she was

looking for some business.

Tammy took a moment to size the man up.

He seemed timid and a little tense.

She assumed he was in the military.

There were always Marines coming into town from the nearby base.

Marines usually had more money than time, which was fine with her.

She smiled and climbed into the car.

Tammy had gotten a couple of things right.

Her client Andrew Erdialis was a marine, and he was oddly stiff.

While the two had sex, he barely... and he was oddly stiff.

While the two had sex, he barely emoted at all.

But she was wrong about Erdialis being timid.

When Tammy asked for her money, he flew into a fit of rage.

...