Sam Anderson

Back at the police station, the task force is crowded around a cassette player, listening intently. Warren says, This is it, the moment they've been waiting for. At the base of the Grand Canyon, with the sound of the Colorado River rushing before them, Warren has finally worked up the courage to ask Mark the fateful questions he's been carrying with him since they left Phoenix.

Back at the police station, the task force is crowded around a cassette player, listening intently. Warren says, This is it, the moment they've been waiting for. At the base of the Grand Canyon, with the sound of the Colorado River rushing before them, Warren has finally worked up the courage to ask Mark the fateful questions he's been carrying with him since they left Phoenix.

Warren tells Mark, I don't want you to say anything, because if anyone ever asks me, I don't want to be able to tell them Mark said no or yes.

Warren tells Mark, I don't want you to say anything, because if anyone ever asks me, I don't want to be able to tell them Mark said no or yes.

He says, I'm going to ask you four questions.

He says, I'm going to ask you four questions.

Throw the rock away. If the answer to the question is yes, throw the rock away.

Throw the rock away. If the answer to the question is yes, throw the rock away.

If the answer to the question is no, hold on to it. Hey, what are your questions? Okay, what are your questions?

If the answer to the question is no, hold on to it. Hey, what are your questions? Okay, what are your questions?

A rock hits the ground.

A rock hits the ground.

Warren skips the third question and goes straight to the heart of the matter.

Warren skips the third question and goes straight to the heart of the matter.

Did you start any fires? Do you really want to go there? Do you really want to go there? Mark asks. Warren gathers his courage and tries again, asking both of the remaining questions. Are you acting alone? And did you set the fires? Yeah, two rocks, two questions. Mark says, two rocks, two questions. Did you hear that? The faint sound of two rocks hitting the ground. And then... laughter.

Did you start any fires? Do you really want to go there? Do you really want to go there? Mark asks. Warren gathers his courage and tries again, asking both of the remaining questions. Are you acting alone? And did you set the fires? Yeah, two rocks, two questions. Mark says, two rocks, two questions. Did you hear that? The faint sound of two rocks hitting the ground. And then... laughter.

The answer to both questions is yes. They keep hiking. A few minutes later, Mark starts talking. Really talking.

The answer to both questions is yes. They keep hiking. A few minutes later, Mark starts talking. Really talking.

Back at the police station, the tape player clicks off. There's a moment of silence in the room as Rob and his team absorb what they've just heard. Way out in the wilderness, at the bottom of the Grand Canyon, Mark Sands confessed to starting the fires.

Back at the police station, the tape player clicks off. There's a moment of silence in the room as Rob and his team absorb what they've just heard. Way out in the wilderness, at the bottom of the Grand Canyon, Mark Sands confessed to starting the fires.