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
I know I have. Back in 2010 or thereabouts, this guy at work who I trained to run the shift opposite of me is now in prison for multiple murders.
Anyone from Poland remember the case in the news about a guy murdering people so he could take over their property? Yeah, that one…
EDIT: Just for the record, I’ve known many poles over the years, and I’ve liked most of you. Except that guy. He was fucking weird. Don’t remember his exact name, but he went by Winnie/Vinny, or something like that.