If there be laid on him a sum of money - the ransom of his life - So it appears that, though by the law he forfeited his life, yet this might be commuted for a pecuniary mulct, at which the life of the deceased might be valued by the magistrates.
The animal was slain as a tribute to the sanctity of human life (Compare the marginal references and Genesis 4:11). It was stoned, and its flesh was treated as carrion. Guilty negligence on the part of its owner was reckoned a capital offence, to be commuted for a fine.
In the case of a slave, the payment was the standard price of a slave, thirty shekels of silver. See Leviticus 25:44-46; Leviticus 27:3, and the marginal references for the New Testament application of this fact.