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


Let’s just say some people I know lost their mother at a very early age and when one of them finally asked the father about it 30 years later, his explanation was “well person X was at work that night, ask him”. Person X being a business partner of his, somewhat of a low-end organized crime guy. Dead for like 10-15 years at that point.
When I say lost, I mean she hasn’t been found decades later. Not even a body.
Early 90s were a crazy ass time here in Estonia.
There’s more details I know, but honestly if I go too into detail and the story makes its way out of our tiny community here, people who know about the whole thing will instantly figure out who I am and who I’m talking about and I don’t want that. Not because I’m in any danger from anyone - just because I don’t want it to happen.