A tomboy who used her motorcycle crash helmet to beat her girlfriend about the face and then stomped on her has admitted to police she was drunk at the time and acted in a fit of jealousy.
The vicious attack at the entrance to a dormitory in Bangkok last Thursday was videoed by onlookers who kept telling her to stop, and later posted on Facebook, drawing heavy fire.
Kanchana Sinprasert, 27 was arrested at a house in Sukhothai province on a court warrant on assault charges and was returned to Phahol Yothin police station in Bangkok on Tuesday.
The large-framed woman was later taken for a crime re-enactment at SB Place dormitory on Soi Ratchadapisek 36 in Chatuchak district.
Ms Kanchana admitted assaulting her 22-year-old girlfriend Fang (whose full name was withheld), who was sitting at the front of the dormitory, around 1.45am on July 19 in full view of male tenants. Another woman and a man later came to her rescue.
The video clip showed the assailant shoving the victim and then using a crash helmet to hit her about the face. The attacker dragged the victim by the hair and repeatedly stomped on her, beating her head against the ground several times.
The victim was badly hurt and is being treated at a hospital. Doctors said she would need medical treatment for about two months.
Metropolitan Police Bureau deputy commissioner Sompong Chingduang said the suspect confessed that she had acted under the influence of alcohol and assaulted her girlfriend in a jealous rage.
She would be taken for a urine test to see if their were traces of drug use in her system. If she tested positive for illicit drugs, additional charges would be pressed against her, Pol Maj Gen Sompong said.
Ms Kanchana would be taken to the Criminal Court on Wednesday, where police would seek to detain her for another 12 days to allow further investigation. Police would oppose bail, the deputy city police chief said.
The current charge against her carries a penalty of 6 months to 10 years in jail and/or maximum fine of 200,000 baht.
The family of Fang planned to file a complaint with police against Ms Kanchana on Tuesday. The victim suffered a fractured eye socket and required surgery.
The suspect had promised to pay her medical bills and compensation, Thai media reported.