in the near future a Government sponsored torturer is using his position to steal information and money from death row inmates. He is unaware that his next prisoner is an undercover agent sent to trap him.

Still not making sense. Who is the main character? What is he trying to do? Who or what stands in his way?

Think corrupt cop being trapped by internal affairs. Cop = Torturer. Internal Affairs = police raids, the thing used to trap corrupt cop, like a bag of cocaine = info undercover agent has.

The confusion is why the logline is difficult.

The more you try to explain the story and the characters' motivations the less I understand any of it...