Thai Court Delivers Second Death Sentence to Sararat Rangsiwuthaporn in Cyanide Case Linked to Illegal Online Gambling Debts
TL;DR — Thai court issued Sararat Rangsiwuthaporn a second death sentence for cyanide murder tied to gambling debts. She spent $2.3 million over three years on illegal site Fun88, with single-day bets up to $290K. This is the seventh ruling in 15 cases against her.
SCCG Take — The facts tie extreme crime directly to addiction on unlicensed offshore platforms, underscoring enforcement gaps that leave regulated operators exposed to reputational spillover in Asia.
A Thai criminal court has issued a second death sentence to Sararat Rangsiwuthaporn, the woman known as “Am Cyanide” and identified by prosecutors as the country’s worst serial killer. Prosecutors state she killed for financial gain while struggling with debts from a gambling addiction.
Rangsiwuthaporn spent 78 million baht (US$2.3 million) over three years on the illegal online gambling site Fun88. Court records show single-day wagers sometimes reached 10 million baht (US$290K).
Latest Death Sentence and Poisoning Details
On August 25, Rangsiwuthaporn received the second death penalty for murdering Darinee “Fah” Thepthawee, a friend and creditor. She had borrowed 60,000 baht (US$1,850) from Thepthawee and persuaded her to join three informal savings schemes promising returns totaling around 200,000 baht (US$6,150).
In December 2020, Rangsiwuthaporn lured Thepthawee to a local market for food laced with potassium cyanide. Thepthawee later suffered convulsions, muscle rigidity, foaming at the mouth, and died from multiple organ failure.
This was the seventh judgment in 15 cases against Rangsiwuthaporn. She has received two death sentences, two life sentences, and three acquittals. She was initially sentenced to death in September 2024 for the murder of Siriporn Kanwong.
Arrest and Scope of the Investigation
Rangsiwuthaporn was arrested in Bangkok on April 25, 2023, after Siriporn’s family raised suspicions about her sudden death on April 14. Forensic tests detected cyanide in Siriporn’s body. Police found a bottle of cyanide in Rangsiwuthaporn’s possession.
Investigators then examined other sudden deaths involving people who had financial connections to her through loans, car deals, or informal savings schemes. Alleged victims include an ex-boyfriend and three female police officers. As reported by Casino.org, prosecutors claim she borrowed from victims before killing them and stealing their valuables.
The case remains active across the remaining matters.
Reporting: Casino.org News
Generated by SCCG’s automated editorial system from published source reporting. SCCG Management holds editorial responsibility.
Extreme crime linked to unregulated offshore gambling exposes enforcement gaps and reputational risk for licensed operators across Asia.
This isn't a crime story — it's a regulatory failure case study. When illegal operators like Fun88 run unchecked, they create harm that taints the entire sector. We've spent three decades helping operators build compliant, safe market entry strategies across Asia-Pacific, and cases like this prove why robust licensing and player protection aren't just compliance boxes — they're existential.
- $2.3M wagered over 3 years on illegal site Fun88, single-day bets hit $290K
- Second death sentence; seventh ruling in 15-case serial murder prosecution tied to gambling debts
- Highlights enforcement gaps allowing offshore operators to fuel addiction and reputational spillover
SCCG angle: SCCG works with regulators and licensed operators across Asia to build compliant market infrastructure that separates legal gaming from offshore chaos. Our network includes compliance advisors and government relations partners who help clients navigate complex enforcement environments and position licensed products as the safe, accountable alternative.
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