Arrested Abdullah Al Mamun, 50, is the general secretary of Bajitpur union unit AL.

Investigation officer inspector Md Mujibur Rahman arrested him from Pashchim Basantapur Cinema Hall area.

According to sources, Omar Chan Sachchu Mia was stabbed dead at his sleep on the night of June 27, 2017 in a contact of Tk 2 lakh.

Deceased’s brother filed a case with Bajitpur Police Station the following day.

As the murder case could not be solved, it was handed over to Kishorganj Police Bureau of Investigation (PBI).

After one year of investigation, PBI arrested Nantu Mia, 28, a resident of Dorighagtia village in the upazila.

Nantu, later, gave his confessional statement before a court.

According to his statement, police arrested Al-Amin, 32.

Later, police arrested Al Mamun on Wednesday night following the statements of Nantu and Al-Amin.

Al Mamun was sent to jail on Thursday following a court order, PBI police superintendent Md Shahadat Hossain confirmed.

LRR/ALM