/tɜːnkoʊt ˈwɪtnəs/ – Phrase
Definition: nhân chứng phản cung.
A more thorough explanation: A “turncoat witness” refers to a witness who changes their testimony or loyalty, often by switching sides or providing contradictory evidence in a legal proceeding. This term is typically used in a negative context to describe a witness who is perceived as unreliable or untrustworthy due to their change in testimony.
Example: In the trial, the defense attorney cross-examined the turncoat witness who had previously testified for the prosecution.