Troy Roberts

As the police interview continued, detectives question Mark about his last production, a suspense thriller called House of Cards. The plot? A hockey-mass serial killer lures a man to a garage via the internet and kills him.

Hours later, Mark Twitchell even agreed to let officers back into the garage where he had filmed House of Cards. Little did they know, the case was about to take an unusual turn.

Hours later, Mark Twitchell even agreed to let officers back into the garage where he had filmed House of Cards. Little did they know, the case was about to take an unusual turn.

Hours later, Mark Twitchell even agreed to let officers back into the garage where he had filmed House of Cards. Little did they know, the case was about to take an unusual turn.

That's because police were still looking for Johnny Altinger's red Mazda. So investigators called Mark again. And again, he voluntarily agreed to answer more questions. This time, Bill Clark conducted the interview.

That's because police were still looking for Johnny Altinger's red Mazda. So investigators called Mark again. And again, he voluntarily agreed to answer more questions. This time, Bill Clark conducted the interview.

That's because police were still looking for Johnny Altinger's red Mazda. So investigators called Mark again. And again, he voluntarily agreed to answer more questions. This time, Bill Clark conducted the interview.

Clark listens while Mark tells him how he came into possession of a red car, a detail he failed to mention when he spoke with police earlier.

Clark listens while Mark tells him how he came into possession of a red car, a detail he failed to mention when he spoke with police earlier.

Clark listens while Mark tells him how he came into possession of a red car, a detail he failed to mention when he spoke with police earlier.

So what are you thinking when you hear that, that he purchased a car for $40?

So what are you thinking when you hear that, that he purchased a car for $40?

So what are you thinking when you hear that, that he purchased a car for $40?

The serial killer movie being filmed. The strange story about the red car. For Clark, it could only mean one thing.

The serial killer movie being filmed. The strange story about the red car. For Clark, it could only mean one thing.

The serial killer movie being filmed. The strange story about the red car. For Clark, it could only mean one thing.

But it was only a hunch. Clark had no hard evidence against Mark and was forced to let him go, though he wasn't going to make it easy.

But it was only a hunch. Clark had no hard evidence against Mark and was forced to let him go, though he wasn't going to make it easy.

But it was only a hunch. Clark had no hard evidence against Mark and was forced to let him go, though he wasn't going to make it easy.

Heward left the garage film set unharmed but rattled. And his unease only escalated when police asked him about that allegedly fake movie blood they had spotted in the garage.