RLD leader Amar Singh was discharged by a Delhi court in the 2008 cash-for-vote sting operation case in November 2013.
He is not on bail, as reported by Hindustan Times, but was absolved of the charges.
The Delhi police, in its first charge sheet filed in August 2011, had accused Amar Singh and LK Advani's ex-aide Sudheendra Kulkarni of "conspiring" and "masterminding" the cash-for-vote scam to bribe some MPs ahead of a confidence vote in Lok Sabha on July 22, 2008.
Regarding Amar Singh, the court said the circumstances against him do not go beyond the "realm of suspicion".
Earlier, Amar Singh had sought discharge from the case, saying there was no evidence to show that he had induced the BJP MPs to cross vote in the trust vote in Lok Sabha in 2008 in return for money. The case was registered in 2009 on the recommendation of a parliamentary panel which had probed the scam.