Itaewon had been Seoul's default Halloween destination for years, drawing increasingly massive crowds to its dense grid of bars, restaurants, and clubs. The 2022 gathering was the first major Halloween celebration after the lifting of COVID-19 restrictions, and anticipation was high. Despite estimates that up to 100,000 people would attend, no major crowd control measures were implemented. Only 137 police officers were assigned to the area, focused primarily on drug enforcement rather than crowd safety. In the days leading up to the event, emergency services had received multiple reports warning about dangerous crowd conditions at previous Itaewon gatherings. A police task force later concluded that these warnings were ignored.

A crowd crush is not a stampede. The distinction matters because it determines responsibility. In a stampede, people run and trample each other; the crowd itself causes the harm. In a crush, the crowd becomes so dense that individuals lose the ability to move or even remain standing. Forces from the crowd compress those caught in the densest areas, making it impossible to breathe. In the narrow, sloping alley near the Hamilton Hotel, the topography worked against survival. Those who fell on the downhill slope were pinned beneath others who could not stop their own forward momentum. Twenty-seven of the 159 who died were foreign nationals, reflecting Itaewon's character as Seoul's most international neighborhood. The crush was the deadliest disaster in South Korea since the sinking of the MV Sewol in 2014 and the worst mass-casualty event in Seoul since the Sampoong Department Store collapse in 1995.

A special police task force completed its investigation on January 13, 2023, concluding that inadequate preparation by both police and government, despite multiple prior warnings, was the primary cause of the disaster. The investigation found that authorities had known about the risks but failed to deploy sufficient personnel, establish crowd flow controls, or designate the gathering as an event requiring formal management. The head of the Yongsan Police Station and several senior officers were subsequently indicted. The investigation also revealed that emergency calls from people trapped in the crowd had gone unanswered in the critical minutes before the crush reached its deadliest point.

In the aftermath, President Yoon Suk Yeol declared a national period of mourning, and memorials appeared throughout Seoul. But grief quickly turned to anger. Families of the victims and civic organizations held sustained protests demanding accountability, arguing that the disaster was preventable. The president initially acknowledged partial responsibility for the government's failure to protect its citizens, but later walked back his statements, shifting responsibility elsewhere. The political response deepened a sense among many South Koreans that their government had failed to learn from previous disasters. Itaewon's narrow alleys, which had always been part of the neighborhood's character, now carried a different weight entirely.

The alley where 159 people died is still an alley. There is no architectural solution to what happened there, only systemic ones: crowd monitoring, density limits, flow management, and the political will to impose them. South Korea has experienced enough preventable disasters, from the Sampoong collapse to the Sewol ferry sinking, that the pattern itself has become part of the national conversation. Each tragedy prompts reforms, and each subsequent tragedy reveals their limits. For the families of the mostly young victims, many of whom were in their twenties enjoying a night out, the question is not abstract. Their children went to a party in a neighborhood they knew well, in a city that should have been safe, and did not come home.