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


Same here. While no one in my family has ever owned a gun, I can think of at least 3 people I’ve met who have killed someone. One was by a nice woman and was clearly in self-defense.