Corrected entry: Castor Troy has the surgeon and other two witnesses killed in a fire to prevent anyone from knowing the identity between him and Archer had been switched. However, when the surgeon performed the operation, he had several assistants helping him, none of whom were killed in the fire. Which means other people knew about this.
mightymick
13th Oct 2011
Correction: Just because we don't see them killed on screen, doesn't mean they weren't killed. Troy could easily have murdered them at their homes or killed them in another room at the medical center.
LorgSkyegon