When a person who hates the victim kills unintentionally, the city of refuge does not serve as a haven for him. This is implied by Numbers 35:23, which states that a person who is exiled: "is not the victim's enemy." We operate under the presumption that one who is an enemy is close to having acted willfully.
Who is considered to be an enemy? A person who did not speak to the victim for at least three days because of animosity.
Similarly, all the following individuals are considered close to having acted willfully, and a city of refuge does not serve as a haven for them:
a) a person who entered an intersection holding an open knife in his hand without realizing that the victim was approaching from the other side and unintentionally stabbed him, causing his death;
b) a person who unintentionally pushed a colleague to his death with his body and not with his hands;
c) a person who intended to throw a stone that could kill two cubits, and instead threw it four;
d) a person who thought that it was permitted to kill;
e) a person who intended to kill one person and instead killed another. This applies even if he intended to kill a gentile or an animal and instead killed a Jew.