Contradiction with Exodus 21:12-13
Exodus 21:12-13 prescribes death for a person who kills another, whereas Deuteronomy 4:41 provides cities of refuge for those who accidentally kill someone.
Exodus 21:12-13: He that smiteth a man, so that he die, shall be surely put to death.
Contradiction with Numbers 35:16-19
Numbers 35:16-19 states that a murderer shall be put to death by the avenger of blood, contrasting with the refuge provided in Deuteronomy 4:41.
Numbers 35:16-19: And if he smite him with an instrument of iron, so that he die, he [is] a murderer: the murderer shall surely be put to death.