Siwan is the stronghold of RJD parliamentarian Mohammad Shahabuddin. Credit: PTINew Delhi: The CBI on Monday took custody of Rashtriya Janata Dal (RJD) leader Shahabuddin, whose name has cropped up as an accused in the investigation of journalist Rajdeo Ranjan’s murder.CBI sources said Shahabuddin has been brought to the agency headquarters for questioning in this case.Shahabuddin was lodged in Tihar prison.The agency told a Muzaffarpur court that his name has surfaced as an accused in the case and requires his custodial interrogation.The agency was granted the permission by the court to question him.The four-time RJD MP from Siwan is alleged as having been involved in the murder of Ranjan, a journalist of a prominent Hindi daily in Siwan last year.Shahabuddin is facing trial in more than 45 criminal cases. He was moved to Tihar Jail in February 2017 on a Supreme Court order after a plea by Siwan native Chandrakeshwar Prasad, whose three sons were killed in two separate incidents.Ranjan was gunned down on May 13 last year and his wife has accused Shahabuddin of having a role in the killing.