The truth revealed that he was an idealist who saw something wrong and was blindly trying to do the right thing. And it cost him his life.
It was similar to the psychology that often led a murderer to volunteer to join the search for the missing person they had actually killed and buried. They had to get close to the investigation to learn what was going on, while hiding in plain sight also brought them psychological fulfillment.
Courts across the country had long approved the use of deception and trickery by police in an interview setting with a suspect, holding that an innocent person would see through the deception and not falsely confess to the crime.