Thai cybercrime authorities have arrested prominent crime victims’ advocate and anti-corruption campaigner Atchariya Ruangrattanapong as part of an investigation into an online Muay Thai betting operation that police say handled more than THB1 billion (almost 30 million US dollars) in turnover.

Officers from the Cyber Crime Investigation Bureau (CCIB) detained Atchariya near the Siam Om Noi boxing stadium in Samut Sakhon on Saturday under a Criminal Court warrant issued the previous day, according to Thai PBS News. Authorities have accused him of public fraud, money laundering, illegal electronic betting on boxing and offenses related to computer crime laws.

The arrest marks a significant development involving one of Thailand’s most recognizable independent campaigners, whose public efforts over the years have frequently focused on alleged corruption within law enforcement and other state institutions.

Investigation Expands From Online Boxing Betting Network

According to police, the case emerged from a broader probe into online gambling activity connected to the “Muay Pak Yok Variety” operation. Earlier this year, investigators raided six locations in Bangkok’s Bueng Kum district, arrested six suspects and seized 245 mobile phones along with assets valued at more than THB6.3 million.

Authorities said the gambling network generated financial turnover exceeding THB1 billion. As investigators reviewed financial records linked to the operation, they traced transactions to accounts associated with Atchariya and the Crime Victims Assistance Club, the organization he founded in 2009.

Police said they identified 212 transactions worth more than THB40 million that they believe connect to accounts uncovered during the gambling investigation. Investigators also examined broader account activity, reporting that Atchariya’s personal bank account recorded 1,196 transactions totaling more than THB191 million, while an account belonging to the Crime Victims Assistance Club showed 5,140 transactions worth more than THB168 million.

Combined turnover across the two accounts exceeded THB359 million, although police acknowledged that the overall transaction figures do not in themselves establish that the money came from illegal gambling. Investigators have instead focused on the 212 transactions that form a central part of the case.

Police also stated that Atchariya held sole authority to withdraw funds from the club’s account.

Separately, authorities said complaints had been received from donors who believed their contributions would be used to support crime victims. Investigators allege that some donated funds were misused and have incorporated those claims into the fraud portion of the case.

Activist Rejects Allegations and Questions Case

Following his arrest, Atchariya was questioned for several hours before being transferred to Thung Song Hong Police Station. He is scheduled to appear before the Criminal Court, where investigators are expected to seek his continued detention.

Atchariya has denied all accusations. He maintains that the Crime Victims Assistance Club’s finances were separate from his personal accounts and says the transactions cited by investigators have legitimate explanations. He also disputes allegations involving THB414,000 that form part of the fraud claims.

According to Atchariya, THB12,000 related to a religious kathin ceremony and a personal payment, while THB400,000 represented part of an agreed THB1 million fee for investigative work concerning suspected nominee companies in Phuket.

The activist has also questioned the timing of the arrest warrant and argued that influential figures within law enforcement want him imprisoned. Police have rejected suggestions that the investigation is intended to harass him, insisting the case developed from financial evidence uncovered during the gambling probe.

Authorities further reported that some complainants alleged they donated money after seeing social media promotions linked to the organization and later believed the funds were not used as expected. Investigators are continuing efforts to determine whether additional individuals were involved.

Longtime Campaigner Faces Another Major Legal Battle

The case has attracted widespread attention because of Atchariya’s public profile. A former construction businessman from Surat Thani who later studied law, he became known for pursuing complaints involving alleged official misconduct and high-profile criminal investigations.

His campaigns have included scrutiny of the investigation into the death of actress Nida “Tangmo” Patcharaveerapong, allegations involving Chinese detainees at an immigration detention center, claims of forged arrest warrants and complaints concerning suspected corruption connected to gambling operations.

In 2024, Atchariya publicly alleged links between police officers, politicians and online gambling networks, claiming that financial flows connected to the BNK Master network involved dozens of officers and several political figures. Those allegations were submitted for investigation and were not court findings.

His relationship with authorities has often been contentious. Much of his recent activism focused on accusations involving police conduct, including claims directed at cybercrime officers.

Saturday’s arrest also follows another legal case earlier this year. In April, Atchariya received bail after being charged in connection with an alleged THB2.5 million extortion scheme involving an immigration police officer. That case stemmed from accusations that pressure was applied to prevent public disclosures relating to Chinese detainees. Atchariya denied wrongdoing and argued that the prosecution was linked to his attempts to expose misconduct.

Police have stressed that the current gambling and fraud investigation is separate from the extortion matter and is based on financial evidence gathered during the online betting probe.

The competing narratives will now move into the court system. Investigators say the money trail uncovered during the gambling investigation points to criminal activity, while Atchariya insists that lawful transactions are being mischaracterized. The evidence has not yet been tested in court, and the activist continues to deny every allegation against him.