
Jidarat Promkhun was arrested last month over her alleged role in the killing and dismemberment of Warisara Klinjui.
“But she was not anywhere near the crime scene in Khon Kaen province on the day of the murder,” Jidarat’s elder sister said on Thursday.
She said there was evidence that Jidarat was in Bangkok at the time of the killing.
The petition was submitted earlier this week.
The Justice Ministry’s deputy permanent secretary Dusadee Arawuit said on Thursday that his ministry would have to verify facts before extending help.
“At the very least, the suspect will have to pass a lie detector,” he said.