The arrestee was identified as Nader Hossain alias Nendu, 35, son of late Monir Uddin of Haragachh Char Chatura village in the upazila.
Rab-13 media officer ASP Khandakar Golam Mortuza said members of the Crime Prevention Specialised Company of the elite force conducted a drive at Fulbari under Shariakandi upazila of Bogura in the early hours and arrested Nader.
Nader had long been in extramarital affairs with Rikta Begum, 19, daughter of Wahed Ali of Nagirdha Kutirghat village in Kaunia and had been pressurising his wife Golapi Khatun, 26, to give him permission to marry Rikta.
As she refused to entertain his demand, Nader with the help of Rikta strangulated Golapi to death on Sunday, Mortuza said.
Victim’s brother filed a murder case with Haragachh Police Station in this connection.
Though police managed to arrest Rikta after the murder, Nader had been on the run.