It takes only 3 elders to make a JC. They can add more if they feel the need. When I was only 20 I was in a JC that had 5 elders. The CO and DO were asked to join
This sounds like a JC for sure if you asked me. Why 3 elders? Watch out for these nuts, they will DF you in a heartbeat.
I would avoid them at all costs if he doesn't want to get DFed. Do not go into a meeting blindfolded. Make them tell you what it is about. What are the charges and who are the accusers? You have a right to ask these questions.
Good luck,
Greybeard