Third, he remains in city for lifetime of high priest. There is a difference between murder and manslaughter. Both take a human life. But only first one calls for capital punishment. Malice is the key.
Accidents can happen.
Our society always tries to find someone at fault. We would tell Joshua to sue the axe company for making a shoddy product. A. Cities are chosen by God himself. Six cities are spread out evenly, both sides of Jordan River. B. Protection is only for accidental murder.