Two bad men came and sat opposite him, and accused him in front of the people, saying, “Naboth has cursed God and the king.” So they took him outside the town and stoned him to death.
If anyone kills a person, the murderer is to be executed based on the evidence given by witnesses, plural. No one is to be executed based on the evidence given by a single witness.
That person is to be executed based on the evidence given by two or three witnesses. No one shall be executed on the evidence given by a single witness.
The evidence given by a single witness is not enough to prove a sin or a crime against someone, never mind what offense they are alleged to have committed. The facts must be confirmed by the evidence given by two or three witnesses.