A 25-year-old youth was found dead under mysterious circumstances at a rehabilitation centre along Nobogram Road in Barisal in the early hours of Friday.
The deceased was identified as Chandan Sakar, 25, son of Chittaranjan Sarkar of the Barapaika area in Agailjhara upazila.
Chandan, a drug addict, was admitted to Holy Care Drug Rehabilitation Centre on August 7, according to his family members, who suspect foul play.
Sarwar, a volunteer at Holy Care, said, "I was told around 3:15am that someone had ended his life in the washroom. I rushed there only to find Chandan hanging from the grill of the window with a towel."
On information, police took the body in their custody and sent it to the morgue of Sher-e-Bangla Medical College and Hospital for an autopsy.
Also read - Barisal police official beaten to death at mental health hospital in Dhaka
Though the rehab staff claimed that Chandan had committed suicide, his family members suspect that he was murdered.
One of his relatives said, "If Chandan had committed suicide, then why did the rehab staff bring the body down before the cops reached the spot."
Meanwhile, other patients at the rehab centre claimed that Sarwar, in charge of the volunteers, often beat them up. Chandan Sarkar was also thrashed around 10:30 on Thursday, they alleged.
Mainul Haque Tamal, manager of Holy Care, said that the body was taken away by police for post-mortem. "We will wait for the police probe."
Shahjalal Mallick, sub-inspector at Kotwali Model Police Station, said the body had bruises. "We will investigate the death," he said.