“The fight has just begun. We want all the accused hanged, and we will fight for that, till the end,” he told the Indian Express.
Six men are facing murder charges after allegedly luring the 23-year-old onto a bus in New Delhi on Dec 16 and then taking it in turns to rape her before throwing her out of the moving vehicle.
She died of her injuries in a Singapore hospital on Saturday and was cremated back in Delhi on Sunday morning.
Speaking to the same newspaper, the young woman’s father spoke of the impact of the tragedy on the family, saying her mother is consumed by grief.
“My wife had hardly eaten in the last two weeks,” said the father.
“She was exhausted... I think she was not ready to face the shock of our daughter’s death, despite doctors always telling us that she was serious.
“She cried intermittently all of Saturday, but it got worse on the flight back home.”
The father said he too was struggling to accept the news.
“It is too painful. I have not gone inside her room. She was born in this house. Her books, clothes they are all here,” he said.
“It is hard to believe I will never hear her voice again, she will never read books to me in English again.”
India does have the death penalty on its statute book although executions are rarely carried out.
Mohammed Ajmal Kasab, the only surviving gunman of the 2008 Mumbai attacks, was hanged last month but it was the first execution for eight years.
The young woman was cremated privately as millions of grieving, angry residents demanded greater protection for women from sexual violence.
The cremation took place during a private ceremony in New Delhi soon after the woman’s body arrived in the capital on Sunday on a special Air India flight from Singapore, where she died at a hospital Saturday after being sent for medical treatment.
The attack has forced India to confront the reality that sexually assaulted women are often blamed for the crime, forced to keep quiet and discouraged from going to authorities for fear of exposing their families to ridicule. Police often refuse to accept complaints from rape victims, and the rare prosecutions that reach courts can drag on for years.
The woman — who has not been identified — was first treated at a New Delhi hospital before being moved to Mount Elizabeth hospital in Singapore which specialises in multi-organ transplants. The attackers inserted an iron rod into the woman’s body, severely damaging her organs.
Following her death, thousands of Indians lit candles, held prayer meetings and marched through cities and towns to express their grief and demand stronger protection for women and the death penalty for rape, which is now punishable by a maximum of life imprisonment.
But in a sign of how pervasive such crimes are, police in West Bengal state were investigating another suspected gang-rape and death.
The family of a woman said she and her husband were attacked by six men as they returned home after working at a brick factory. They dragged the woman into a nearby farm after pouring acid into her husband’s mouth, the family said.
The woman was found dead with multiple injuries, said police officer Bhaskar Mukherjee, adding he was waiting for an autopsy report. No charges have been made. Another police officer, Sugata Sen, said four men had been detained for questioning.