Robin's remand period ended yesterday, but investigators have yet to ascertain whether he is the same person seen in the CCTV footages near the murder scene.
“We are not sure if Robin is the person who is seen in the footages collected from the CCTV cameras near the murder scene,” said Debdas Bhattacharia, additional commissioner (crime and operation) at Chittagong Metropolitan Police.
He further said police had learnt Robin is a “different kind of terrorist” and is mostly involved with crimes like mugging. “His ideological views have not been confirmed either.”
However, police still maintain that Robin was one of the three men who shot and stabbed Mitu to death before fleeing the scene on a motorcycle, as seen in the footages.
Police have not been able to make headway in the murder investigation since the two suspects were arrested and placed on remand last week.
“We have not yet found the main reason behind the murder, but the investigation is in progress. We are still scrutinising the CCTV footages we have collected. All possible angles are being considered in this investigation,” the CMP official told the Dhaka Tribune.
Meanwhile, Mitu's mobile phone, which went missing right after the murder, has not been found yet.
Police suspect that the killers took the phone away when they fled the scene and are working to find it because it may contain vital information regarding the murder.
Police are also working to find out why Mitu went to the GEC intersection in Chittagong, where the murder took place so early in the morning, and how the killers knew she would be there, the CMP additional commissioner said.
He did not give any further details regarding the case for the sake of the ongoing investigation.
Abu Nosor Gunnu, the other suspect in the case who was also placed on remand for seven days, was brought into custody for interrogation yesterday.
Gunnu's remand period started a week later than Robin's because he had filed a petition to review his remand order, which was turned down by the court.
Mitu, 32, was killed by still unidentified assailants in front of her son on June 5.
Her husband Babul filed a murder case with Panchlaish police station against three unnamed persons and their cohorts the following day.
The Detective Branch of police is currently in charge of the murder investigation, but the Rapid Action Battalion, Police Bureau of Investigation, Criminal Investigation Department, and Counter Terrorism and Transnational Crime Unit are also working on the case.