Read Luke 20:20 Using Other Translations
And they watched him, and sent forth spies, which should feign themselves just men, that they might take hold of his words, that so they might deliver him unto the power and authority of the governor.
So they watched him and sent spies, who pretended to be sincere, that they might catch him in something he said, so as to deliver him up to the authority and jurisdiction of the governor.
Watching for their opportunity, the leaders sent spies pretending to be honest men. They tried to get Jesus to say something that could be reported to the Roman governor so he would arrest Jesus.