Nepal's highest court rejected a review petition filed by international serial killer Charles Gurumukh Sobhraj, on Tuesday, local media reported.
Sobhraj (67), who is also known as the “bikini killer”, was arrested in Nepal in 2003 and has been serving a life sentence since.
A French national of Indian and Vietnamese parentage, Sobhraj had asked that the life sentence verdict be reviewed.
That verdict was handed down after he was convicted in the murder of a U.S. citizen, Connie Joe Bronzich, in 1975.
“There is no need to go against the decision of the registrar who had rejected the review petition,” the Himalayan Times news portal quoted Justice Bharat Raj Upreti as saying.
Last year, Sobhraj filed an appeal against the conviction, but lost.
Sobhraj, who has also served 21 years in an Indian prison on charges of culpable homicide, has continued to claim his innocence and says 2003 was the first time he travelled to Nepal.
Media reports said he had been a con man and was related to a series of killings of women clad in bikinis in the tourist town of Pataya in Thailand in the 1970s.
His lawyer was planning to seek clemency from President Ram Baran Yadav, the Himalayan Times reported.
“Sobhraj has spent eight years in jail. He also deserves recommendation for clemency,” said the lawyer.