What happened
Si Quey, a Chinese immigrant to Thailand, was convicted of killing a child and was later portrayed for decades as a cannibalistic serial killer responsible for multiple child deaths.
The investigation
Contemporary police and court records supported the conviction that led to his execution, but later historians and advocates questioned whether every murder attached to his name was adequately proved.
What the courts or investigators concluded
He was executed in 1959. His preserved body was displayed in a medical museum for decades before being cremated in 2020 after criticism of the exhibition and the certainty of the wider allegations.
Why the case remains significant
The case is important because it sits at the border between documented crime and cultural legend, showing why responsible true-crime writing must distinguish a conviction from later claims that may have grown through repetition.
Case context
Crime by Region organizes cases geographically so readers can move from one file to other investigations from the same country. For unresolved or contested cases, the wording above reflects the distinction between confirmed events, investigative theories and findings actually established in court.