Metropolitan Magistrate Archana Beniwal let off a south Delhi resident, Amit Kumar Yadav, of the charges punishable under the provision of the Arms Act.
The court noted there was no independent witness at the time of arrest of the accused and recovery of the weapon and no signatures of police officials, present at the spot, were taken on the site plan.
"In the absence of any independent witness having been joined in the investigation, false implication of the accused by the local police in the present case cannot be ruled out," the court said.
According to the prosecution, the police had got a tip-off and accused was apprehended with one pistol and five live cartridges near ISKCON Temple in South Delhi on August 18, 2011.