Apparently few people who survived tragedy in Itaewon or were eyewitnesses noticed that there was guy wearing bunny ears, he was with 5-6 friends including foreigners. He was chanting push! push! and pushing people with force.
Professor from U1 University said that if this really happened then police force should focus on finding him but it will be hard to put a blame on just 1 person, because it were different factors which created such situation including the fact that police and officials neglected safety protocols and crowd control.