Bible Verses About Murder: To be proved by two witnesses at least

If anyone kills a person, the murderer is to be put to death on the testimony of the witnesses. But no one is to be put to death based on the testimony of a lone witness.

If, however, a man hates his neighbor and lies in wait, attacks him and kills him, and then flees to one of these cities,

A lone witness is not sufficient to establish any wrongdoing or sin against a man, regardless of what offense he may have committed. A matter must be established by the testimony of two or three witnesses.