You are to give the Levites six cities of refuge to which any of you can escape if you kill someone accidentally. In addition, give them forty-two other cities
These will serve as cities of refuge for Israelites and for foreigners who are temporary or permanent residents. Anyone who kills someone accidentally can escape to one of them.
or by striking him with your fist, you are guilty of murder and are to be put to death. The dead person's nearest relative has the responsibility for putting the murderer to death. When he finds you, he is to kill you.
You are guilty only of manslaughter, and the community is to rescue you from the dead person's relative, and they are to return you to the city of refuge to which you had escaped. You must live there until the death of the man who is then High Priest.
"Those accused of murder may be found guilty and put to death only on the evidence of two or more witnesses; the evidence of one witness is not sufficient to support an accusation of murder.
If you did this, you would defile the land where you are living. Murder defiles the land, and except by the death of the murderer there is no way to perform the ritual of purification for the land where someone has been murdered.