"Treason" is not quite the word. The answer you are looking for is "False". It takes two Witnesses to observe misconduct in another of the faith before it is taken to be proved.
If the court believes their false witness and not yours you could be put in jail. A good lawyer will try to prove the false witness is false.
False testimony (or false witness) in the Bible (and anywhere else) is basically lying. So if you see something, then lie about that to somebody, you are bearing false testimony (or false witness).
To Lie. In a limited sence of the word. It's not a legal term at all.
False Witness - 2000 TV was released on: USA: 7 June 2000
False Witness - 1989 I TV is rated/received certificates of: Iceland:12
"Bearing false witness" means deliberately providing untrue or misleading information, especially in a legal context or when giving testimony under oath. It is typically considered a violation of ethical and moral principles, as well as potentially being a criminal offense.
Lying means to tell a lie, whereas bearing a false withness means to carry that lie futher. When we hear rumors we should not speak them unless we know them to be true because the rumor maybe a lie and if we "gossip" about it or carry it to the next person, we have become bearers of a false witness.
Bonanza - 1959 False Witness 9-6 was released on: USA: 22 October 1967
The Lineup - 1954 The False Witness Case - 2.8 was released on: USA: 18 November 1955
Gunsmoke - 1955 False Witness 5-14 was released on: USA: 12 December 1959
The F-B-I- - 1965 False Witness 3-11 was released on: USA: 10 December 1967
The Young Lawyers - 1969 False Witness 1-15 was released on: USA: 4 January 1971