The CBI has sought the permission of a city court in Siwan to quiz jailed RJD strongman Shahabuddin in connection with its probe in the murder of journalist Rajdeo Ranjan.
Ranjan, Siwan bureau chief of Hindi newspaper Hindustan, was murdered on May 13, 2016 by unknown assailants.
It is suspected that the contract to kill Ranjan was allegedly given by Laddan Mian to two sharpshooters, CBI sources said.
The sources said Laddan Mian is considered close to politicians, including Shahabuddin.
The agency has already examined a number of suspects in the case and has now sought the permission to examine Shahabuddin who is currently lodged in Tihar prison here in a separate case.
The CBI had taken over the investigations in Ranjan's murder in September last year.
The sources said two suspected sharpshooters--Mohammed Javed and Mohammed Kaif--have been questioned by the agency.
The CBI sources said they had taken over the investigation in the murder case which has been registered under the IPC sections related to criminal conspiracy, murder and arms act.
According to the rules, the CBI takes over the same FIR which has been registered by the state police.
However, the sources said, the investigation of the agency is completely free and it may arrive at any conclusion which may or may not be in concurrence with the state police.