Dhaka, Oct. 30 -- The Police Bureau of Investigation (PBI) has taken Ahmed Shahriar Reza Dwip into custody over Tahsif Souri's death.

The retired Bangladesh Air Force flight lieutenant had left home at the call of Dwip, a "friend-like younger brother", before he went missing.

The PBI brought Dwip to its Dhaka Metro North office on Thursday night, Police Superintendent Abu Yousuf said on Friday.

He said the PBI was checking information provided by Dwip, including details of the places he and Tahsif had visited together.

Tahsif, said to have filmed the video of ousted prime minister Sheikh Hasina fleeing the country, was found dead in the Turag River near Rajabari Ghat. His body was recovered on Wednesday afternoon.

His father Enayetul...