In the second century a mural was drawn from the Susannah story on the walls of the Roman catacombs - all the early texts included the story of Susannah. The reformationists/protestants took it out of their bible - I assume the anti-catholic wtbts have also. Catholics have kept the story in the Bible, it's a part of Daniel.
It's a story of the 'two witnesses' - elders. Susannah's second witness of course was God.
"The book tells the story of how Daniel saved Susannah from a false charge of adultery, prompted by her rejection of the advances of two elders. Daniel's interrogation of the elders proved that they were not telling the true story."
Check it out in a real Bible - good teaching story.
Bang