In season 2 episode 14 Steadman shoots himself in a motel as police show up and Michael and Lincoln are forced to leave the scene. However if agent Kelleman knew about how they faked Steadmans death couldnt they have matched the dna from the body to the teeth which were placed in the dummy body that got buried and re-dug up? This would prove that Steadman didnt die when lincoln was supposed to have murdered him.