The clues are tantalizing.

A sporty red car.

A speck of cigarette ash.

A battered hard drive.

It is a mystery.

It absolutely is a mystery.

But what do these clues say about the sudden disappearance of the district attorney who left them behind?

It's baffling. It's confusing.

And perplexing. It's all of those things.

His name is Ray Guitart. When he vanished in 2005, it was a big story.

A prosecutor in Pennsylvania who vanished on Friday is still missing.

Now Ray's story is linked to an even bigger one.

Stunning allegations of sexual child abuse.

One of the most story names in college sports is enveloped in scandal.

Because seven years before he went missing, Ray Guitart decided not to prosecute Jerry Sandesky

for the first known allegation of child sex abuse against him.

Now, some are asking whether that Sandesky case had anything to do with the DA's disappearance.

For anyone to think there is no relationship is the epitome of naivete.

Others say no way.

Well, eliminating Ray doesn't eliminate the problem for anybody.

Ever since the Sandesky scandal broke, Dateline has been on the ground, analyzing the clues,

digging into the case, and talking to those who knew the DA from Center County.

...