Matthew Poole and continuators on Leviticus 17:4

4 And bringeth it not unto the door of the tabernacle of the congregation, to offer an offering unto the LORD before the tabernacle of the LORD, blood shall be imputed unto that man : he hath shed blood, and that man shall be cut off from among his people :

This was appointed, partly in opposition to the heathens, who sacrificed in all places; partly to cut off occasions of Idolatry; partly to prevent the peoples usurpation of the Priests office; and partly to signify, that God would accept of no sacrifices but through Christ and in the Church; (of both which the Tabernacle was a type. See Heb. 9. 11.) and according to his own prescript. But though men were tyed to this law, God was free to dispense with his own law, which he did sometimes to the Prophets, as 1 Sam. 7. 9. and 11. 15. &c. and afterwards more fully and generally in the days of the Messiah, Mal. 1. 11. Ioh. 4. 21, 24.

He shall be esteemed and punished as a murderer both by God and by men, See Isa. 66. 3. The reason is, because he sned that blood which though not mans blood, yet was as pretious, being sacred and appropriated to God, and typically the price by which mens lives were ransomed.

By death, either by the hand of God, in case men do not know it or neglect to punish it, or by men, if the fact was publick and evident.