After two hours of failed attempt to revive Wanchai, doctors announced at 8:30 pm that the lecturer of Phranakhon Rajabhat University, died at 7:15 pm.
Wanchai, who held himself hostage, shot himself at 6:44 pm after policed tried but failed to talk him to surrender.
The Paolo Memorial Hospital will send Wanchai's body to the Police Hospital for an autopsy Friday morning.