But ... if the murderer's slightly decomposed body gets turned up in a shallow grave in the woods by some hiker's dog ...
Who are the PoPo going to come looking for? Prosecutors and juries love stupid statements. That stupid statement establishes intent; it encourages The State to find or fabricate opportunity and means.
Our friends in the justice system love to punish vigilantes and such. Lock ‘em up and throw away the key.
But punishing actual murderers? Not the same intensity there.