Exodus 21:28-29

28Perhaps a bull may attack someone so that the person dies. Then you must throw stones at the bull to kill it. You must not eat the meat from that bull. But do not punish the owner of the bull.

29But perhaps that bull has attacked people before. Perhaps someone warned the owner about this, but the man did not keep the bull in a safe place. If that happens, and the bull kills someone, you must kill the bull. You must also punish the bull's owner with death.