Charley and Bo'er were next door during Negan Lovar's trial, and a Spell Formula allowed everyone in the room to see the trial scene unidirectionally.
As Negan looked perplexed at the bishops and said, "Are we... really worse than them, and deserving of death?", Charley silently sat down in the corner chair.
He also questioned himself—Negan Lovar had escaped a disaster in his youth, he had hidden all his life to avoid being discovered. He had never committed any serious evil; his greatest sin was probably digging up others' graves, but such things were also done by those who didn't practice Undead Magic. Even if caught, it would at most result in a severe beating, not death.
The next words Negan said left Charley unsure of how to respond,
