Widow Nazma alias Dhalabanu, 42, of Sakhipur upazila was strangled to death after she was raped by seven drug addicts at her house at Protima Bonki village in the upazila last year.
Local police unearthed mystery of the killing on Sunday, over six months into the incident.
Lutful Kabir, officer-in-charge (investigation) of Sakhipur Police Station, said Nazma’s decomposed body was recovered from the bathroom of her house on October 5 last year. Nazma lived at the house alone as her husband died about ten years ago. Her two sons work in Dhaka.
Her younger son Azizul Miah later filed a case with the police station, accusing unidentified assailants.
Tracing the missing mobile phone of Nazma, Sub-Inspector Shamsul Haque, investigation officer of the case, arrested Alamgir Hossain, 22, of Mucharia Pathar village in the upazila on Saturday.
Alamgir gave confessional statement to Sumon Kumar, senior judicial magistrate in Tangail under Section 164 on Sunday (April 21), described the brutal killing and disclosed names of six other drug addicts involved in the crime.
Taking drugs, Alamgir and six others went to the house of Nazma and six of them forcefully raped her after stuffing a scarf in her mouth to swallow her screams.
When the last man went to rape Nazma, she was dead. They later left the house after keeping her body into the bathroom. They also took away her mobile phone set and gold ornaments, said the IO.
OC Kabir said police previously arrested another accused Habibur Rahman about one month ago.
The arrestee was later sent to jail through a court, he said.
Police are raiding different areas to arrest other accused in the case, sadi the police official.