If that is the law, it looks like a pretty bad one: A person on the run would have to choose between getting killed and breaking the law. The rational choice would almost certainly be to break the law and shoot, which might or might not get him killed years later, depending on the punishment for shooting back and of course whether he actually gets caught. There is still a question as to whether that's a morally acceptable choice, of course: maybe it would be rational but immoral to shoot back, yet permissible but irrational not to! However, there probably are plenty of cases that do not fall into that category because it's not immoral to shoot back - e.g., at least, most of the cases in which the violence that was initiated did not amount to something for which he deserves to be executed.