The court in its judgment said the RJD chief was guilty of fraudulently withdrawing Rs 3.13 crore from the Dumka Treasury between December 1995 and January 1996, when he was the chief minister of undivided Bihar.
Former chief minister Jagannath Mishra was also found guilty in the case pertaining to fraudulent withdrawal of Rs 37.62 crore from the Chaibasa treasury in the 1990s.
The quantum of punishment will be announced on January 3, 2018.