witness against

See: informer
References in classic literature ?
No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury, except in cases arising in the land or naval forces, or in the Militia, when in actual service in time of War or public danger; nor shall any person be subject for the same offense to be twice put in jeopardy of life or limb; nor shall be compelled in any criminal case to be a witness against himself, nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use without just compensation.
If they have been corrupted, their elder relatives (if not themselves) might surely come into court and witness against him, and there is an opportunity still for them to appear.
But no, thank heaven, both man and horse were gone, and nothing was left to witness against me but two objects - unpleasant enough in themselves to be sure, and presenting a very ugly, not to say murderous appearance - in one place, the hat saturated with rain and coated with mud, indented and broken above the brim by that villainous whip-handle; in another, the crimson handkerchief, soaking in a deeply tinctured pool of water - for much rain had fallen in the interim.
I knew that if I should do anything that should miscarry, and should be carried to prison, she would be there and ready to witness against me, and perhaps save her life at my expense.
Ferrari was the first to find it out--and that the guilty persons had reason to fear, not only that he would acquaint Lord Montbarry with his discovery, but that he would be a principal witness against them if the scandal was made public in a court of law.
If you had been in Miss Rachel's sitting-room, at that time of night, with Miss Rachel's knowledge (and if you had been foolish enough to forget to take care of the wet door) SHE would have reminded you--SHE would never have let you carry away such a witness against her, as the witness I was looking at now
There shall be no letter to bear witness against you
If, when I come back, I fail to prove to you that Miss Bygrave is the woman who wore that disguise, and used those threatening words, in Vauxhall Wall, I will engage to leave your service at a day's notice; and I will atone for the sin of bearing false witness against my neighbor by resigning every claim I have to your grateful remembrance, on your father's account as well as on your own.
But you may prosper, for all that: there is no just God that governs the earth righteously, but a God of lies, that bears witness against the innocent.
The shells of the eight he sucked he broke to fragments as a dog might break them, and, to build the picture he had long visioned, of the eighth egg he reserved a tiny portion which he spread, not on Jerry's jowls where his tongue could have erased it, but high up about his eyes and above them, where it would remain and stand witness against him according to the plot he had planned.
You may have seen in the newspapers, sir,' said Gabriel, pointing to the one which lay by his side, 'that I was a witness against this man upon his trial some days since; and that it was not his fault I was alive, and able to speak to what I knew.
and, in the judgment day, I will stand up before God, a witness against those that have ruined me and my children, body and soul!