trips chkt
Deuteronomy 17:6
6 On the testimony of two or three witnesses a person is to be put to death, but no one is to be put to death on the testimony of only one witness.
Deuteronomy 19:15
Witnesses
15 One witness is not enough to convict anyone accused of any crime or offense they may have committed. A matter must be established by the testimony of two or three witnesses.
It's jewish law.