en_tn/jhn/08/06.md

to trap him

This means to use a trick question.

so that they might have something to accuse him about

What they would accuse him of can be made explicit. Alternate translation: "so that they could accuse him of saying something wrong" or "so that they could accuse him of not obeying the law of Moses or the Roman law" (See: rc://en/ta/man/jit/figs-explicit)