Police are seeking a woman said to be the girlfriend of one of the six suspects who allegedly beat a disabled man to death on Soi Chokchai 4 after relatives of the victim accused her of being involved in the incident.
Pol Col Chairop Junnawat, chief of Chokchai police, said Tuesday that investigators had questioned relatives of the victim who called on police to take legal action against the woman.
The woman, whose name is not yet known, was seen with the suspects while they assaulted and killed Somkiat Sichan 36, who had difficulty walking, in Lat Phrao district on Sunday.
According to Pol Col Chairop, Somkiat's relatives told investigators that witnesses saw the woman encourage the suspects to assault and kill Somkiat.
He said the woman allegedly shouted that her boyfriend was the son of a police officer.
"We are investigating the matter. If we find evidence linking the woman with the brawl we will press criminal charges against her," he said.
On Monday, Chokchai police arrested six suspects: Akkaradet Tassana, 22, Monmanat Saengpho, 22, Mek Phonkraison, 19, and Arin and Thiraphon Yotphonganan, 20 and 21 respectively, and an 18-year-old whose name was withheld.
Mr Thiraphon, Mr Arin, Mr Mek and Mr Monmanat are reported to be sons of non-commissioned police officers attached to Metropolitan Police Division 4 which oversees Chockchai, where the brawl took place.
Mr Thiraphon was admitted to a hospital for treatment and is now in custody, police said.
The six men are accused of assaulting Somkiat following an altercation over a motorcycle accident after which they bullied him for his disability.
One suspect and the victim were injured. Somkiat was later pronounced dead at a hospital.
Police pressed charges of assault causing death and possessing weapons against the arrested men.