Your screenshots shows the reportee doing multiple failrp /me's but you mentioned
If you have video recording or more screenshots of him breaking his role as an event character and if there was any logs perhaps from a staff member who was there at the time, it would help your case more. I can see that Mango, a staff member, was there at that time might have screenshots of logs or any more proof. I can trust you to take your word on this but sufficient proof is always more desirable. I can see that the "Interruption of debrief" could be because of the /me's and possibly other actions provided in your screenshot. If he refused to leave 19thAW tryouts and the Jedi Temple, shock could of easily handled it. Nonetheless, the only proof you provided was of their failrp /me's in your screenshots. In my opinion, I would punish the player for a failrp warn with the current proof provided.