From the link:
Chaiwat’s ordeal is, however, not yet over. He and four of his former subordinates at Kaeng Krachan National Park are still facing murder, abduction and obstruction of justice charges, filed against them by the Department of Special Investigation, over the enforced disappearance and presumed death of Karen human rights activist Porlajee Rakchongcharoen, aka “Billy”, back in 2014
Seems he is yet another entitled murderous hiso scumbag or maybe it's just a misunderstanding!
I really despair about Thailand's ruling class if this specimen and his ilk are anything to go by its no wonder Thailand is going backwards, it would appear this one really is without any redeeming features...