Superintendent of Sylhet Police Khalekuzzaman, said the PBI members arrested Titu from the police lines in the morning.
This is the first arrest made by police after the death of Raihan Ahmed.
Later, Sylhet Additional Cheif Metropolitan Magistrate Zihadur Rahman placed Titu on a five-day remand when police produced him before the court in the afternoon.
Meanwhile, Foreign Minister Dr AK Abdul Momen on Tuesday said suspended sub-inspector Akbar Hossain Bhuiya, who remained fugitive after the incident, will be brought back home if he fled abroad.
The Foreign Minister came up with the remark while visiting the residence of Raihan Ahmed in the city’s Akhalia area.
“I think that SI Akbar is in the country as we have issued red alert along the borders of the country. If he managed to go abroad then necessary steps will be taken to bring him back,” said Momen.
On October 11, Rayhan Ahmed, 34, a resident of Akharia in Sylhet city, was beaten to death in police custody, said the family of the victim.
His wife Tahmina Akter Tanni filed a case with Kotwali Police Station the following day accusing a number of unidentified people.
Besides, the authorities on October 12 suspended four policemen, including the in-charge of Bandarbazar Police outpost Sub-Inspector Akbar Hossain, in connection with the death of a man ‘in police custody’ in Sylhet.
Three policemen have been withdrawn in this connection on the same day.
Police rejected the allegation and said Rayhan was caught by locals of Kastghar area during robbery and was lynched.
Besides, the case has been transferred to the Police Bureau of Investigation.
Read Also: Writ petition seeks probe into Sylhet man's death ‘in police custody’