Shavua Tov. There is a small reference in פרשת משפטים to the עיר מקלט, city of refuge.
The Parsha is giving a procedural instruction in the event that one causes someone else’s death. Ultimately, it is the court that decides whether one is a murderer, totally innocent because of it being an accident, and the situation where one was negligent. In the latter case, the killer remains in the עיר מקלט until the death of the כהן גדול.
Just like today we have notification on highways where the nearest hospital is, there used to be similar notifications as to where the closest עיר מקלט was found.
We needed to protect the killer from the גואל הדם, avenger of blood from prematurely taking the law into his own hands.
The court authorities escorts the alleged killer to בית דין for protection. He is judged in court who will determine his final fate.