Nestled in the far reaches of Puget Sound, in the Pacific Northwest, you can find a chain of gorgeous tranquil islands.

It's so beautiful, but it's changed for me now. I don't, it's marred.

In 2009, three days before Halloween, a grisly crime stunned the seaport town of Anna

Cordes, Washington.

I can only describe it as evil.

Something horrible, something terrible.

The blood on the walls, the blood on the carpet, it told a story of what took place.

The scene was at the house of a popular dog trainer named Mark Stover.

Mark was known as the Dog Whisper of Antiquordis and the dog trainer to the stars. He could speak dog.

They knew that he knew them.

There was blood on Mark's driveway,

and blood on the floor throughout his house,

but there was no sign of Mark.

I've never seen in my career a case

that has as many twists and turns and mysteries as this case

with Mark Stover.

They soon discovered a story tangled in obsession.

His eyes went just crazy. He clenched his hands and fists,

and he was just in a shaking rage.

A love triangle between Mark Stover?

He couldn't control his obsession.

You know, he chronicled his obsession.

...