They have a 2 or 3 witnesses policy both in the OT and NT.
However, they don't follow the biblical precedent of a public trial.
They have 3 man secret tribunal star chamber hearings. The elders
are not to be questioned because they are appointed by God and we
can 100% trust them :( .
If it was handled similar to when 2 women brought about a dispute before
King Solomon in a public setting people would know about the accusation regardless
of the 2/3 witness rule. However, Eccliastical Law says you can't have a public hearing
to protect the public image of those involved. Probably brought about by church leaders
a long time ago so they could have their inquisition and kill all heretics in private, not to mention
the Satanic religious pharisees set this standard in the trial of Jesus.