Verses with the word inquisition in the Old Testament (3 verses):

Deuteronomy 19:18
And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;

Esther 2:23
And when inquisition was made of the matter, it was found out; therefore they were both hanged on a tree: and it was written in the book of the chronicles before the king.

Psalms 9:12
When he maketh inquisition for blood, he remembereth them: he forgetteth not the cry of the humble.