as a former member of an arson task force i can see where you're comming from. We had one member of the task force setting fires to fight them (not a john orr type) he was just in a slow department looking to fight fire and decided to set his own. I was not in a leadership position at that time but i did feel dirty as if the entire unit was smeared. We got through it and went on, but i do believe that fire departments should screen for that type of person. We have all seen the "overinterested buff" that we see at ALL of our fires and in the back of our minds ask...is he setting them? Usually they dont because only the sickest buff does that type of thing. So how do you spot a potential firefighter arsonist? i would take a cue from Dr. Lecter. He asked Clarice, "What does he do, this man you seek?"...He covets. If i had a guy in my department that was SINGLE, and HAD A LOT OF TIME ON HIS HANDS and was the type of firefighter who ALLWAYS TALKS ABOUT FIGHTING FIRE and on actual fires hangs back and does a good job of "talking the talk but dont walk the walk" i'd be watching out. Without too much more information on a psych level i can only describe my gut feelings of what "i" would be watching out for