Both he who led away the goat, and he who burned the parts of the sin-offerings had to purify themselves. They who went out of the camp during a religious solemnity incurred uncleanness; hence, the need of purification.
Shall burn in the fire - i. e., consume in the fire, not burn sacrificially. See Leviticus 1:9.
26 And he that let go the goat for the scapegoat shall wash his clothes, and bathe his flesh in water, and afterward come into the camp.
27 And the bullock for the sin offering, and the goat for the sin offering, whose blood was brought in to make atonement in the holy place, shall one carry forth without the camp; and they shall burn in the fire their skins, and their flesh, and their dung.
28 And he that burneth them shall wash his clothes, and bathe his flesh in water, and afterward he shall come into the camp.