Joshua 20:4
4 And when he that doth flee unto one of those cities shall stand at the entering of the gate of the city, and shall declare his cause in the ears of the elders of that city, they shall take him into the city unto them, and give him a place, that he may dwell among them.
As soon as the manslayer presented himself at the city of refuge, the elders of the city were to hold an inquiry, and receive him provisionally into the city. Afterward, when the avenger of blood should have tracked his victim to the city, and appear to claim him, a more formal and thorough investigation Joshua 20:6 was to be made. Consult the marginal references.