CID Senior Superintendent of Police N Rajamarthandan was arrested at midnight and was today produced before the court, which remanded him to two-day police custody, Guwahati Police Commissioner Hiren Chandra Nath told PTI.
"We arrested him last night at 12. Today we produced him in the court and we received two days of remand," he said.
The SSP was the CID's Public Information Officer and was heading the Special Investigation Team (SIT) formed to probe the Silapathar case.
"We have collected sufficient evidence from Rajamarthandan. To some of the queries he could not give satisfactory replies to the Investigating Officer. So we needed his custody for further interrogation," Nath said.
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He dismissed allegations of conspiracies by some senior officials to implicate Rajamarthandan in the case.
"Investigation carried out till now hints about some conspiracies between Rajamarthandan and some private persons. But nowhere it is found that any senior police officials were involved. It is an absolute lie.
The Assam Police had suspended Rajamarthandan with immediate effect on April 4 for allegedly revealing crucial information on the investigation in a reply to an RTI query.
AASU general secretary Lurinjyoti Gogoi had alleged a conspiracy to free the main accused in the case Subodh Biswas, the all-India president of NIBBUSS.
Biswas was arrested from West Bengal on March 22 and is currently in police remand.
On March 6, NIBBUSS had organised a public meeting at Silpathar followed by a march demanding citizenship for all Hindu immigrants from Bangladesh.
According to a report of an all-party delegation of the Assam Assembly, around 2,500 people marched through the town after the meeting and ransacked the AASU office, damaged the Shadid Bedi (martyrs memorial), furniture, electrical items, sign board and photographs of the state's icons Bhupen Hazarika and Jyoti Prasad Agarwala.
More than 40 accused named in the FIR, who were found involved in the incident during investigation, have been arrested from different parts of Assam.
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