Neither was involved.
Maybe...Po orchestrated the kidnapping so that he could bring his grandfather back and cement himself in the good graces of his family? Since he’s the youngest? He could be lying about not wanting the power. Why was he in Murgon that night? He could also have orchestrated it, knowing that the Council would try to save him, so that he could worm his way into Randa’s court and train with Katsa to learn her weaknesses so he could kill her.

