The victim has confirmed the matter, he said, while briefing reporters at the Noakhali Chief Judicial Magistrate Court's auditorium in the afternoon.
Kabir said probe body members talked to the victim in the morning.
Delwar firstly forced himself into the victim's house one and a half years back and threatened her with weapons, he said. Delwar raped her and threatened to kill and murder and gang-rape her if she screamed, he added.
After few days, Delwar and his accomplice Kalam took her to a boat on a nearby lake where they both tried to rape her, Kabir said, adding that although Kalam left her after she cried for mercy, Delwar again raped her on the boat.
Delwar became agitated as he failed to rape the victim several times since then, he stated.
The victim will file a rape case over the matter and her testimony will be recorded under section 22.
The final report will be submitted to the NHRC Chairman after the investigation is complete, he said.
The victim was allegedly molested by some local miscreants at Ward No. 9 of Eklashpur Union of the upazila last month but the incident came to light after a video of the incident went viral on the internet.
The miscreants tortured the housewife after undressing her and filmed it.
Also read: Noakhali housewife’s molestation: Main accused on 7-day remand
The victim filed two cases accusing nine people on Sunday, 33 days after the incident.
One case was filed under the Women and Children Repression Prevention Act and another under the Pornography Control Act.
Also read: Protests continue as fury spreads over rape incidents