The Police Bureau of Investigation (PBI) has taken Ahmed Shahriar Reza Dwip into custody for questioning in connection with the death of former Bangladesh Air Force officer KM Tahsif Souri, whose body was recovered from the Turag River on Wednesday, a day after he went missing.

A senior law enforcement official confirmed the development to Daily Waadaa late Thursday night (October 29). The official said PBI members had taken Dwip in connection with Tahsif's death but added that he had no further details.

According to Tahsif's family, Dwip had spent around six hours with him before he went missing.

A police source said law enforcement personnel took Dwip from the third floor of a house in Block B of Babar Road in Dhaka's Mohammadpur area on Thursday night. Dwip is the son of Selim Reza, a resident of the same area.

Speaking to UNB over the phone on Friday morning, PBI Dhaka Metro-North Additional Deputy Inspector General Md Enayet Hossain Mannan said Dwip was taken into custody for questioning and information collection.

“He is currently with us, and we are collecting information from him. We will verify the information to see whether it provides any clues to the killing,” he said.

CCTV footage recorded shortly before Tahsif went missing showed him with another person, whom his family identified as Dwip.

The footage shows Tahsif meeting the person in front of a garage at the Rajuk Uttara Apartment Project in Sector 18 of Uttara at around 6:30pm on October 27. They shook hands before leaving the area on separate motorcycles.

A motorcycle was also recovered from Tongi in Gazipur, although PBI officials were still verifying whether it belonged to him, UNB reported.

According to family members, Tahsif left home after receiving a call from Dwip. Dwip later told them that they had gone to a workshop after a problem developed with Tahsif's motorcycle.

He reportedly said that after the motorcycle was repaired, they returned home and had a meal together, following which Dwip left.

Police received information about a body floating in the river through the national emergency helpline 999, then sent it for an autopsy, with Tahsif’s identity confirmed through an iPhone found in his possession. The cause of death has not yet been established.

His death also sparked speculation on social media over possible links to footage of former prime minister Sheikh Hasina fleeing Bangladesh on August 5, 2024.

Tahsif was reportedly involved in sharing the footage and was later retired from the Air Force. A journalist, a relative and a former military colleague have linked his death to the controversy surrounding the footage. However, these claims remain independently unverified.