Relatives of victims in the murder and gang-rape case in Phattalung's Srinagarindra district will push to have the two juvenile suspects to be tried as adults due to their violent behaviour.
These two suspects, along with at least three other suspects, killed a "friend" and gang-raped his pregnant girlfriend last week.
During the young man's funeral yesterday, his uncle told reporters that they would ask the Lawyers Council of Thailand to help with their request to have the two suspects' case be transferred from the Juvenile and Family Court to the provincial court.
The uncle also called for police to continue investigating the case, as he believes there are more accomplices than the five currently in custody.
The family will also join Thai celebrity Panadda Wongphudee's social campaign to object to a pardon for rape-murder convicts.
Meanwhile, the Srinagarindra superintendent Pol Colonel Wichai Wichayanareupol said the case should be concluded and passed onto public prosecutors in a month.
He added that though the female accomplice, who was arrested on Tuesday, maintains her innocence, saying she was merely at the scene to deliver food.
The other four suspects in custody have already confessed and re-enacted the crime. The woman and two suspects were taken to court for court-issued detention order yesterday.