Due to the graphic nature of this killer's crimes,

listener discretion is advised.

This episode includes discussions of murder, assault,

and graphic violence that some people may find offensive.

We advise extreme caution for children under 13.

On the evening of October 13th, 1972,

25-year-old Herbert Mullen

cruised along a windy stretch of the Santa Cruz Mountains.

To the casual observer, the young man appeared

to be enjoying a peaceful, solo drive,

but Herbert wasn't exactly alone.

Passengers rode along with him.

Inside his head, voices warned him

that the world was in grave danger.

A giant earthquake was headed toward California,

and the voices insisted that Herbert was the only man

who could stop it.

If he wanted to save the lives of thousands,

Herbert needed to take one today.

Only if he made a sacrifice to God,

could natural disaster be prevented.

Herbert gripped the steering wheel tightly,

...