This thesis discusses the court-martial of Army Captain Rogelio "Roger" Maynulet and the public reaction to the trial. Maynulet's court-martial took place in 2005 for the mercy killing of an Iraqi during his deployment in 2004. While in pursuit of Muqtada al-Sadr, who was considered a high value target, Maynulet killed the driver of the car which intelligence said al-Sadr was a passenger. Maynulet was convicted of voluntary manslaughter and dismissed from the military. The goal of this research is to show Maynulet was rightly convicted and delve into how public reaction reveals varied and divisive opinions toward mercy killing and military behavior.