The victim, a student of Class XII, was allegedly gang-raped by eight youths a few days ago while she was going to meet her maternal uncle in Patel Nagar area of the district, police said.
The girl narrated the incident to her mother who then informed it to her husband Krishan, a labourer, police said. Krishan raised the issue with the elders of the village who then started questioning the boys allegedly involved in the incident.
The accused allegedly threatened the family that they would make the girl's objectionable pictures public if the matter was reported to the police.
Apprehending public humiliation, Krishan allegedly consumed poison last evening and died.
Today the panchayat of Dalits called on Superintendent of Police B Satheesh Balan who asked the SHO Sadar Police station to book and arrest the accused.
A case has been registered against the accused under sections 376 and 306 of IPC (rape and abatement to suicide).