Investigations since the murder of Bangladesh-born US citizen and blogger Avijit Roy is yet to make any headway.
The investigation team also failed to obtain any clues from Shafiur Rahman Farabi, the prime suspect in the murder case who was put on remands twice each for 10 days. The investigators also failed to traced out leader of Ansarullah Bangla Team Redwanul Azad Rana although a bounty of Tk5 lakh was declared earlier.
The Detective Branch (DB) of police is now investigating the murder with the US-based investigating agency FBI. Members of both the investigation agencies have had a number of meetings but they have not been able to make any headway in the murder case.
Meanwhile, Avijit's wife and fellow blogger Rafida Ahmed Bonya was seriously injured as she tried to save Avijit during the attack mounted soon after the couple came out of the Ekushey Boi Mela at around 8:30pm on February 26 at Dhaka University campus. She has returned to the US for better treatment.
Another FBI agent is expected to arrive in Bangladesh to provide 'technical' support in the investigations into the murder of Avijit Roy.
Detectives are hopeful of finding clue in their hunt for the criminals as the new member is an expert crime analyst.
The new member would not only be able to help trace the killers but also the location of the suspected 10 Facebook users and the list of whom was prepared based on the information provided by Farabi, says a top of DB official, requesting anonymity.
The investigation has now been stalled, said another official adding that everything now depends now on the arrest of Rana. Once the arrest is made the mystery can very easily be unearthed, he added.
Monirul Islam, Joint Commissioner of DB police, said they were holding meetings with the FBI team as to how the killers could be traced.
Prof Ajoy Roy, father of slain blogger Avijit Roy, on Friday expressed his suspicion that Tariq Farseem Mannan, a teacher of Bangladesh University of Engineering and Technology (Buet), might have had his hand in the murder.