Biggest Unanswered Questions From The Saw Franchise

In the "Saw" franchise, Dr. Lawrence Gordon (Cary Elwes) is one of Jigsaw's first test subjects. He's the former oncologist of John Kramer, and the lesson he needs to learn is to respect life more than he does. In the first film, he famously hacks off his own foot to escape and get to his family. Then he returns later on in the series, revealing that he's become one of Kramer's accomplices.

Interestingly, the police had been keeping close tabs on Dr. Gordon for a while, suspecting that he might have been Jigsaw in the first place. After his ordeal of being traumatically locked in a bathroom and sawing off his own foot, why doesn't he go straight to the police station and tell them everything that happened? Why doesn't he reveal Kramer as the real Jigsaw? As a doctor, he took an oath to protect and save lives, yet he seems to forget about this rather quickly as he embarks on a mission to help Kramer instead. Sure, he might have seen the light and experienced a bit of Stockholm syndrome in the process, but he could have easily put a stop to Jigsaw's reign of terror before it got out of hand.