Sam Anderson

She was a mountain biker? Oh, yeah. But it's not just super vague personality profiling. Whoever is lighting these fires, they are always one step ahead. Maybe that does point to an inside job.

She was a mountain biker? Oh, yeah. But it's not just super vague personality profiling. Whoever is lighting these fires, they are always one step ahead. Maybe that does point to an inside job.

Agent Terry Kearns again.

Agent Terry Kearns again.

With all this in mind, Ken leaps into action and investigates the female firefighter. He brings her in for questioning.

With all this in mind, Ken leaps into action and investigates the female firefighter. He brings her in for questioning.

But it turns out her alibis, they're solid. She was not at the scene of the fires. So we ruled her out. I do wonder whether the fact that she was a woman working in a pretty male-dominated field might just have a little something to do with the huge amount of scrutiny she received from her colleagues. Ken is at home, lying in bed next to his wife. Kids are asleep when the phone rings.

But it turns out her alibis, they're solid. She was not at the scene of the fires. So we ruled her out. I do wonder whether the fact that she was a woman working in a pretty male-dominated field might just have a little something to do with the huge amount of scrutiny she received from her colleagues. Ken is at home, lying in bed next to his wife. Kids are asleep when the phone rings.

Ken stumbles out to the landline. It's headquarters. A tip has come in from a security guard who spotted a suspicious man inside a construction site on the edge of the preserve.

Ken stumbles out to the landline. It's headquarters. A tip has come in from a security guard who spotted a suspicious man inside a construction site on the edge of the preserve.

— When he gets there, the officer on duty briefs him about this new suspect they just arrested at a construction site. He's a local man with a complicated past, once accused of murder.

— When he gets there, the officer on duty briefs him about this new suspect they just arrested at a construction site. He's a local man with a complicated past, once accused of murder.

Could this local guy be setting fires for sexual gratification? Because, believe it or not, that sort of thing is well documented. Some convicted arsonists have set fires because it turns them on.

Could this local guy be setting fires for sexual gratification? Because, believe it or not, that sort of thing is well documented. Some convicted arsonists have set fires because it turns them on.

Rabbit hole number two. Ken starts digging into who this guy really is. We were going strong after him. Ken grills the man on where he was during each of the fires. He gives Ken alibis for all of them. Then he throws himself on Ken's mercy. Yes, he masturbates in construction sites, but he's not an arsonist. He can explain.

Rabbit hole number two. Ken starts digging into who this guy really is. We were going strong after him. Ken grills the man on where he was during each of the fires. He gives Ken alibis for all of them. Then he throws himself on Ken's mercy. Yes, he masturbates in construction sites, but he's not an arsonist. He can explain.

I like to think of myself as a pretty open-minded guy, and I definitely don't want to kink-shame anybody. But the smell of freshly cut wood? That's a new one for me. Ken isn't satisfied. He tracks down the man's friends and interviews his current wife.

I like to think of myself as a pretty open-minded guy, and I definitely don't want to kink-shame anybody. But the smell of freshly cut wood? That's a new one for me. Ken isn't satisfied. He tracks down the man's friends and interviews his current wife.

Ken methodically checks out each of the man's alibis. And just like the firefighter, they're solid.

Ken methodically checks out each of the man's alibis. And just like the firefighter, they're solid.