Lee Sun-Kyun's cause of death was revealed after an alleged suicide.

 

Lee Sun-Kyun faced severe public scrutiny as police investigated him for illegal drug use a few days before his death

Lee Sun-Kyun, the well-known actor from Parasite, tragically passed away with the cause of death being carbon monoxide poisoning. 

His body was found in a car near Waryong Park in central Seoul, with evidence of lit charcoal briquettes inside the car.

 The actor had apparently locked himself in the car, leading authorities to believe that he had taken his own life.

Before this tragic event, Sun-Kyun was under public scrutiny for alleged illegal drug use, despite South Korea's strict drug laws.

 This led to his withdrawal from several projects he was working on. His family requested that no autopsy be conducted, adding to the mystery surrounding his death. 

The circumstances of his passing have left many questions unanswered.