hostile witness

noun

1. a witness who gives evidence against the party calling him

Example Sentences

And hostile witnesses, he said, are “mostly ineffective with jurors.”

From Salon

Prosecutors consider McConney a reluctant witness, and had sought unsuccessfully that he be declared a hostile witness so they could question him more aggressively.

From Reuters

However, District Judge Andrew Sweet said the CPS could compel Mrs Barton to give evidence or treat her as a hostile witness.

From BBC

While Pence has yet to comment on the committee’s work, Trump would certainly be a hostile witness.

From Seattle Times

He has also vowed to subpoena hostile witnesses like Speaker Nancy Pelosi, ostensibly to learn what she may have known about security at the Capitol before the attack.

From New York Times