The Supreme Court Friday upheld the death sentence against Pol Lt Gen Chalor Kerdthet, a former police commissioner, on charges of orchestrating the abduction and pre-meditated murder of a jeweller's wife and son.
He showed no emotion when the judge read the verdict.
Chalor, then chief of a police investigative team in charge of Saudi jewelry theft case, was convicted by the lower courts in abducting and killing a mother and son to force a businessman to give him information about the stolen jewelry.
Chalor was convicted of abducting Darawadee Srithanakhan and her son and killing them to force her husband; Santi Srithanakhan to cooperate with the investigation.
The lower courts sentenced Chalor to death.
The case started in 1994 when Darawadi and her son Seri were killed by Chalor's men.
Chalor was put in charge of finding jewellery items that were stolen by a Thai worker from the palace of a Saudi Arabian prince in 1989.
Darawadi's husband Santi was a jeweller whom Chalor had earlier snatched to try to pry information from him on where the Saudi heritage pieces were hidden.
When Darawadi and her son went missing, Santi rushed to ask Chalor for help.
He was told that his wife and son might have been detained.
Santi was contacted by the kidnappers, who demanded Bt2.5 million.
Despite paying the ransom, he never saw his wife and son alive again. A hospital in Saraburi informed him that they were dead.