Police on Tuesday said they had made forensic progress in the gruesome killing of a Bangkok bank clerk who was murdered and then dismembered, but have made no arrests in the case.
The man's body was found last Thursday where it had been dumped in a dry canal bed in Chai Nat's Manorom district.
Police identified the dead man as Kriangkrai Khwan-on, 24, a Bangkok native who worked at a commercial bank in the Lat Phrao area. They also found Kriangkrai's Mitsubishi car parked at Lat Yao Hospital in Nakhon Sawan, a neighbouring province.
Forensic police inspecting his car on Tuesday said they found tissue paper stained with semen inside the vehicle, and a fingerprint of an unidentified person on the inside of the windscreen.
DNA test results on the semen traces and fingerprint would take a few days, assistant national police chief Pol Lt Gen Jarumporn Suramanee said at a media briefing.
The victim had bruises on his right hand and both shins which likely were the result of assault or a fall. Forensic investigators found no other signs of injury or torture on his body. The head was removed by the killer or killers.
The man may have been strangled, struck with a hard object or shot in his head. However, police could not conclude the cause of his death yet until they find his head.
Kriangkrai had not drunk or eaten anything for about six to eight hours before he was killed, lab experts concluded. It was believed at least two persons were involved in the murder because the victim was a large man of large build.
The killers likely used an electric-powered, flesh-cutting equipment of some type, as the victim's limbs were severed cleanly, said Pol Lt Gen Jarumporn.