^6 (A)On the evidence of two witnesses or of three witnesses the one who is to die shall be put to death; a person shall not be put to death on the evidence of one witness.

Laws Concerning Witnesses

¹⁵ “A single witness shall not suffice against a person for any crime or for any wrong in connection with any offence that he has committed. ^(A)Only on the evidence of two witnesses or of three witnesses shall a charge be established.