Who killed the Demon King?

Pop. The Demon King was killed by Pop. Demon King Smoyati died when he was shot to death by Pop from the Reaper team. Appearing in the eleventh season of The Walking Dead, Smoyati was originally a member of Maggie's team. On the way Smoyati was looking for Maggie, he was suddenly attacked by Pop. Smoyati was shot in the head before he could dodge. The troops died.