A case was filed against 22 people including Shadhurpara Union Parishad Chairman Mahmudul Alam Babu on Saturday over the murder of journalist Golam Rabbani Nadim.
Chairman Mahmudul Alam Babu has been made the prime accused in the case.
Slain journalist Nadim's wife Monira Begum filed the case with Bakshiganj Police Station mentioning the name of 22 accused.
The police station OC Sohel Rana confirmed this matter.
Ten person have, so far, arrested in connection with the murder, police said.
Prime accused Babu was arrested from his relative's house in Char Tistapara village of Panchagarh's Debiganj upazila early Saturday.
Golam Rabbani Nadim, Jamalpur district correspondent of online news portal Banglanews24.com, was killed at night of June 14 in an attack by Shadhurpara Union Parishad Chairman Mahmudul Alam Babu's followers.