GOD'S WORD® Translation
The judges must make a thorough investigation. If it is found that the witness lied when he testified against the other Israelite,

American Standard Version
and the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and have testified falsely against his brother;

Berean Study Bible
The judges shall investigate thoroughly, and if the witness is proven to be a liar who has falsely accused his brother,

Douay-Rheims Bible
And when after most diligent inquisition, they shall find that the false witness hath told a lie against his brother:

English Revised Version
and the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;

King James Bible
And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;

World English Bible
and the judges shall make diligent inquisition: and, behold, if the witness is a false witness, and has testified falsely against his brother;

Young's Literal Translation
and the judges have searched diligently, and lo, the witness is a false witness, a falsehood he hath testified against his brother:

Deuteronomy 19:18 Additional Translations ...