Tanvir Siraj, president of Basan thana unit of BNP, filed the case with the court of Gazipur Additional Chief Metropolitan Magistrate-2 on Tuesday.
Taking the case into cognisance, Judge Alamgir Al Mamun ordered the Criminal Investigation Department to investigate it but it did not set any timeframe to submit its report.
According to the plaintiff, the allegations made by Sarjis against involving BNP in journalist Tuhin murder were baseless and damaging.
After filing the case, BNP leader Tanvir and his lawyer Advocate Siddiqur Rahman said that journalist Tuhin was murdered for making a video of a criminal gang but without knowing the facts, Sarjis linked BNP to various propaganda.
This has tarnished the image of the party, forcing him to file the case upon directives from the party, he said.
Tuhin, a staff reporter for Dainik Protidiner Kagoj, was hacked to death in public by a group of armed men near Gazipur Chowrasta on Thursday night, reports UNB.
Md Selim, the victim’s brother, filed a case accusing 20 to 25 unnamed individuals with Basan Police Station under Gazipur Metropolitan Police.