Not just uncaught murderers, there are a lot of people who have killed without legally being considered murderers.
People who killed people in accidents such as driving accidents or hunting accidents
People who killed in self defense
Soldiers who killed enemy soldiers
Executioners
Police officers who have killed on duty
Doctors and nurses who have made mistakes that accidentally killed patients
Yea, you know Sir Alec Guinness (the actor that played Obi-Wan) has killed a few people. He wouldnt call WW2 his “best performance” if he didnt take a few baddies out.