Where as, Sobhraj's lawyer Sree Krishna has accused the judiciary of taking a bribe.
Sobhraj, who is now a French national, was picked up from Kathmandu's Royale Casino in 2003 on charges of travelling on fake passport and later convicted for murder of the backpacker.
His trial has attracted international media attention, particularly after he announced his engagement and marriage to Nepalese teenager Nihita Biswas in 2008, while inside prison.
His first victim was a young woman from US who was found drowned in a tidal pool in the Gulf of Thailand wearing a bikini, giving him the infamous nickname the "bikini killer."
He is also suspected in 12 murder cases across Asia.