Question here...why did they not deliver the coup de grace to the other 3? They couldn't be sure that the robbers were completed immobilized and shouldn't be at their mercy. Since they had guns during the commission of a felony, its plain that they were willing to commit murder, so why are they shown any mercy?    People like this can never be rehabilitated and simply take up resources to incarcerate (if caught and prosecuted) and they steal from society both literally and by taking away security. The sooner they stop breathing the better.