Doctor killed for 'overcharging' patient 41 published : 21 Dec 2020 at 05:44 41 The lone gunman who killed the director of Phra Chom Klao Hospital on Saturday told police that he shot the doctor out of anger after thinking he was overcharged for his visit while under the influence of drugs. Denphum: Had personal grudge Pol Maj Gen Sumeth Poonsri, the chief of Samut Songkhram police, told the press that Denphum "Phum" Sangthong, 22, had confessed to the police that he had a personal grudge against the victim, Chumphon Decha-amphai, 58. According to Pol Maj Gen Sumeth, the suspect told investigators he was a regular patient at Phra Chom Klao Hospital in Phetchaburi, where the victim was director, and that he had regularly complained about the hospital's poor services.