But witnesses often lie in court. Potential penalties of a fine or jail time do not completely suppress false testimony.

但证人却常常在庭上说谎话，即使会被罚款或入狱，仍不能完全杜绝假见证。

youdao

The judges must make a thorough investigation, and if the witness proves to be a liar, giving false testimony against his brother

审判官要细细地查究，若见证人果然是作假见证的，以假见证陷害弟兄

youdao

Mr Gomez was arrested in 2008 and charged with kidnapping, extortion, rebellion and giving false testimony.

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Or, you can say go in and lie and make up your own false testimony.

CNN

The judge in that case asked for Jennifer to be investigated on suspicion of giving false testimony.

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