University killings and suicide: Motives revealed First of all, police said they learnt from a close associate of Dr Wanchai, who was also his student, that the suspect was hiding at the Suparp Hotel on Sutthisan Winitchai Soi 1 in the Phaya Thai district of BangkokDr Wanchai had gunned down Pichai Chaisongkram, 50, and Natthapol Chumworathayee, also 50, in an examination room in front of a graduate student at Phranakhon Rajabhat University in Bangkok on Wednesdaymorning and subsequently fled. Police rushed to the hotel around noon and began negotiating with the suspect after he was located and identified. Almost six hours of negotiations followed before Dr Wanchai suddenly shot himself. The elderly woman seen negotating with him through a megaphone on live local TV broadcasts was Ladda Samitma, a former boss of Wanchai. She said Dr Wanchai unexpectedly decidedto take his own life while she was talking him into agreeing to eat a meal.