The vigilante who killed Blue Dragon was Adrian Chase, also known as Vigilante. This happened in the TV show "Peacemaker" Season 2, Episode 7. The Blue Dragon was an alternate-universe version of Auggie Smith, who was actually more sensible and anti-Nazi in his world. Despite his attempt to protect Chris Smith (Peacemaker) and others, Vigilante abruptly stabbed Blue Dragon to death before hearing the full explanation about his true nature and intentions. This killing was sudden and brutal, deeply impacting the storyline and Chris Smith's character arc.
