Forensic police walk to the house in Lam Luk Ka district, Pathum Thani, where Pol Col Vachira Yaothaiwong committed suicide on Monday. (Police photo)Pol Col Vachira Yaothaisong, commander of Highway Police sub-division 2, shot himself dead at his house in Lam Luk Ka district, Pathum Thani province, on Monday, a police source said. Pol Col Vachira, 44, was one of the 25 police officers who also attended the party and are being investigated. He died at his home in a housing estate in tambon Khu Khot of Lam Luk Ka district, Pathum Thani. Pol Col Vachira was reported to have sought treatment for despression and stress at Phramongkutklao Hospital after the death of Pol Maj Siwakorn.