Sima Sarker was rushed to Kotalipara Upazila Health Complex in critical condition and later, was declared dead at Gopalganj 250-bed General Hospital, said Madhab Sarker, father of the victim.
Locals handed over Palash Sarker, who allegedly raped the girl, to police on Saturday night.
According to the case statements, on Wednesday, Palash convinced the girl to go to his poultry firm beside their houses and raped her.
After being scolded in a family arbitration, Palash got furious and raped the girl again at her home on Saturday.
Later, Sima hanged herself as she could not bear the disgrace, said the statements.
Madhab filed a case in this regard against Palash, father of four children, and his elder brother Liton Sarker on Sunday.
Hafijur Rahman, sub-inspector of kotalipara police station and also the investigation officer of the case, said Palash not only raped the girl but also spread rumours in the village regarding her character.
“According to our primary investigation, the girl committed suicide being unable to bear the disgrace,” said Hafijur.
Pushpa Rani Sarker, wife of Palash, said her husband and Sima got involved in a physical relation. “When it disclosed, Madhab slapped his daughter and I think that is the reason behind the suicide,” she said.
Post-mortem of the body was completed at the hospital on Sunday.