Chief Judicial Magistrate Arvind Kumar Singh granted bail to Shahabuddin after hearing both sides in the case.
He has been booked under various sections of the IT Act and Prisoners Act.
Siwan divisional jail Superintendent Vidhu Bhardwaj had lodged an FIR with Mufassil police station on January 14 against Mohammad Shahabuddin and one person after the RJD leader's photo of taking selfie inside the jail had gone viral on social media.
On the basis of probe report of a two-member team of SDPO and SDO, the District Magistrate had ordered the Jail Superintendent to lodge an FIR in the case.
The Supreme Court last year cancelled his bail granted by the Patna High Court in connection with the killing of the prime witness in the murder of two brothers.
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