NONG BUA LAMPHU — 25 May 2026, A 38-year-old man with a prior conviction for sexual assault was arrested on Monday afternoon while attempting to flee on a motorcycle, following the discovery of his 13-year-old stepdaughter’s body and a brutal attack on his partner.
The suspect, identified by police only as Pornchai, 38, was apprehended at 14:10 on Monday on a rural road connecting Ban Don Klet and Ban Non Muang Noi in Sri Boon Ruang District.

The arrest followed a tragic discovery earlier that day. Pol. Lt. Col. Pichetphong Ratchabuakhot, an interrogation officer at Sri Boon Ruang Police Station, received a report at 12:30 regarding a fatality at a residence in Ban Mai Tanthawan, Nong Kung Kaeo Subdistrict.
At the scene, authorities located the body of a 13-year-old girl, a local Matthayom 1 student, in a bathroom at the rear of the property. The victim had been bound, and forensic evidence at the scene indicated she had been physically and sexually assaulted before her death. Her body has been transferred to Loei Provincial Hospital for a formal forensic autopsy to determine the exact cause of death.
Outside the residence, authorities also located the victim’s 32-year-old mother. She had sustained severe, deep lacerations to her head and face. Neighbors and family members who arrived at the scene stated she had been attacked and knocked unconscious, effectively trapped inside the home for two days before regaining consciousness on Monday morning. She was immediately transported to a local hospital for emergency medical treatment.
Investigation and Timeline
According to police investigators, the 13-year-old victim typically resided with her maternal grandparents in a neighboring village. However, on Friday 22 May, she traveled to the residence in Ban Mai Tanthawan to visit her mother and stepfather to attend the local Rocket Festival (Bun Bang Fai) scheduled for Saturday.
When the child failed to return home as expected, her grandfather attempted to locate her at the village and her school but found no trace.
Separately, a local resident went to the property on Monday morning to retrieve a motorcycle that the family had borrowed on Friday to access an ATM in town. Upon arrival, the resident discovered the severely injured mother outside the home and immediately alerted relatives and emergency services.

Suspect Intercepted and Tested Positive for Drugs
Following the discovery of the homicide, Sri Boon Ruang District Chief Thanayut Yaikaew, acting in his capacity as an Office of the Narcotics Control Board (ONCB) official, coordinated with local administrative staff, village leaders, and Sri Boon Ruang Police to establish checkpoints along potential escape routes.
Administrative officers spotted Pornchai operating a red-and-white Yamaha motorcycle away from the subdistrict. Officials successfully intercepted and detained him on a village road.
While a physical search yielded no illicit items, a mandatory drug screening returned positive for methamphetamine. According to officials, Pornchai admitted to consuming the substance on Saturday morning.
District Chief Thanayut confirmed that the suspect has confessed to the crimes. Pornchai was initially booked on charges of illegal consumption of a Category 1 narcotic and operating a motor vehicle with illicit substances in his system. He has been handed over to case investigators at Sri Boon Ruang Police Station for further interrogation and the filing of additional criminal charges, including homicide and sexual assault.
History of Recidivism
Pol. Lt. Col. Pichetphong, the investigating officer, noted that the suspect is a repeat offender with a documented history of violence. The officer had previously overseen a past criminal case against Pornchai involving narcotics offenses and the sexual assault of an elderly woman in Sri Boon Ruang District. Pornchai served a prison sentence for those crimes and, upon his release, cohabitated with the victim’s mother before committing the current offenses.
The incident has caused profound shock within the local community and the victim’s school. The school director, Montri Phonphaengkwha, stated that he has submitted a formal report on the tragedy to the regional educational authority. He described the victim as a well-behaved student who lived primarily with her grandparents and had shown no prior signs of distress or safety concerns.
District Chief Thanayut urged local leaders and residents to remain highly vigilant regarding high-risk individuals in their neighborhoods. Speaking to community representatives, village headmen, and educators at the scene, he stated that local administrative networks must prioritize early intervention and reporting to prevent severe criminal offenses within the community.
