Rifat Sharif was killed as a sequel to an altercation with Shamsunnahar Khuki, wife of Barguna Zilla Parishad Chairman, and former lawmaker Md Delwar Hossain, claimed Minni's father, Mozammel Hossain.
Mozammel made this statement during a press conference at the Barguna Press Club around 12pm on Wednesday.
Quoting a report from a national daily, he said, a few days ago, before Rifat's murder, Rifat and his wife Minni went to a restaurant beside the house of former lawmaker Md Delwar Hossain, when his wife Shamsunnahar, and Rifat locked into a confrontation over parking Rifat's motorcycle in front of their house.
At one point during the squabble, Rifat hurled abuses at Shamsunnahar, while she threatened Rifat of teaching him a good lesson, he said.
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Shamsunnahar complained against Rifat to her two nephews -- Rifat Farazi, and Rishan Farazi -- who were seen at the forefront of the murder spot in the video footage of the killing.
"Rifat Sharif's father Dulal Sharif being instigated by a local influential group demanded our arrest. I strongly protest it.
"Minni was arrested to cover up Rifat's murder, and now it would be possible to hide the masterminds of the killing if me, and my wife are also arrested," he added.
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Minni's husband Rifat Sharif, 22, was attacked with sharp weapons near the main gate of Barguna Government College. His wife Aysha Siddika Minni appeared to be trying to protect him, during the broad daylight attack, caught on surveillance camera.
On July 16, police arrested Minni. A court placed her on a five-day remand the following day.
On July 18, Barguna Superintendent of Police (SP) Maruf Hossain said Minni confessed to her involvement in the murder.
The next day, a Barguna court recorded her statements.
Till date, 15 people have been arrested in connection with Rifat Sharif's murder. All of them have confessed to their crimes.
Prime accused Nayan Bond was killed in a gunfight with police on July 2.