He was convicted, sentenced to death, and executed at Bang Kwang Central Prison.

[1] On 17 July 2012, 17-year-old Danudet Sukmak was approached and attacked by Longji and another young person in southern Trang province.

Theerasak then stole Sukmak's mobile phone and money and fled the area.

[4] On 18 June 2018, Theerasak was executed by lethal injection at Bang Kwang Central Prison.

[4] After his execution, prison officials phoned his mother and told her that she or a family member could collect his body.