Additional District Judge Pramod Malik also slapped a penalty of Rs 20,000 on the convict.
Singh, who belonged to terrorist outfit Khalistan Liberation Front (KLF), has been in jail since he was arrested by the Punjab Police in 2004. He was brought to Jaipur and arrested in this case on February 28, 2007.
The Additional District Judge had held Singh guilty in the abduction case yesterday and reserved the order on quantum of punishment for today.
Rajendra, the son of Congress leader and former Union minister Ram Niwas Mirdha, was abducted on February 17, 1995 while out for his morning walk. He was later rescued by the police in an operation.
In May this year, the Rajasthan High Court had directed the lower court to complete the trial within three months and ordered the additional advocate general to personally monitor the case.
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