Hi, park enthusiasts. I'm your host, Dylia Diambra, and the story I'm going to share with you today

is a missing person's case so strange, no matter how many different ways I look at it, I still can't

figure it out. It happened in the fall of 2008, and to this day remains a complete and total mystery,

even to law enforcement investigators still assigned to it.

Recently, the subject's daughter-in-law and one of his adult sons have renewed their search for

answers. They reached out to me through the show's case submission form, and I agreed to feature

the case with the hopes of getting as many eyes and ears on it as possible.

After a lot of digging and interviewing family members, friends, and law enforcement officials,

I'm finally able to share everything I've learned about the disappearance of Robert Willis IV.

The first thing you need to know about his case is that it takes place in a mountainous,

densely wooded section of the Sierra National Forest in California, known as Dinky Creek.

One of the closest communities to this area is Shaver Lake, and even that is roughly 40 minutes or so

from where Robert disappeared. So we're talking about a very vast geographical area.

The more I dug into this story and really studied the landscape where it took place,

the more overwhelmed I became.

This terrain is not for the faint of heart.

You really need to be a local or know it well,

which is exactly what Robert was.

He'd spent a good portion of his life in the very woods he vanished in, which is why his disappearance is so confounding. At the

core of his case, one crucial question remains. What happened to him? Did the Sierra Nevada's

cause him to disappear into thin air?

Or did something or someone else?

...