Commissioner of police Nirmal Singh Dhillon said the police would present the challan in the Ludhiana acid attack within a week. "We have all the evidence against the accused," he said.
He added that the matter was discussed at a meeting of police officials with the director general of police (DGP) in Chandigarh and it was decided to seek all possible legal aid to put the case on the fast track. "I have deputed our law experts to explore all such possibilities," he said.
"It's a very sad day for us. We would not leave any stone unturned to ensure justice to the victim," said Dhillon.
Meanwhile, the addition of Section 302 (murder) of the Indian Penal Code (IPC) to the FIR after the acid attack victim's death is likely to expedite the trial and lead to stringent punishment for the accused.
Assistant commissioner of police (ACP, crime) Gurbans Singh Bains, who led the special investigation team (SIT) formed by the Ludhiana police in this case, said the police would seek death penalty for the accused as it was the "rarest-of-the-rare case of inhumanity."
"Sections 326-B (causing injury by acid), 307 (attempt to murder) and 120-B (criminal conspiracy) of the IPC, under which the FIR was registered earlier, there was no provision of capital punishment," the ACP said.
District Bar Association president Parupkar Singh Ghumman said the Bar would urge the court to give capital punishment to the accused to set a precedent. He also appealed to advocates associated with the Bar not to appear in defence of any of the accused.
Why shifted to Mumbai
Soon after the acid attack, Harpreet was admitted to Dayanand Medical College and Hospital (DMCH), Ludhiana, where her condition remained critical.
"The reason for shifting her to the National Burn Centre, Mumbai, was the deep burns caused by the acid. The chances of recovery were very bleak," said a doctor at DMCH.
The Ludhiana police had announced to bear all expenses of her treatment. The police had already paid Rs 7 lakh to the hospital.
A tale of vendetta
Amitpal Kaur and Taranjit Singh, elder brother of Harpreet Kaur's fiancé Harpreet Singh, had got divorced around a year ago. Soon afterwards, Taranjit had solemnised his second marriage with an NRI. It is learnt that following the divorce, Amitpal had pledged not to allow any girl to marry her ex-husband's brother.
As per the police, when she came to know that her former brother-in-law was going to get married, she hatched a conspiracy involving her paramour and others. She had committed to pay Rs 10 lakh to her paramour, Parvinder Singh of Bakshiwala village (Patiala), for the revenge attack and had paid Rs 1.5 lakh as the first instalment.
The others arrested by the Ludhiana police for helping Parvinder are Sunpreet Singh of Bakshiwala village, Jaspreet Singh and Rakesh Kumar of Amloh and Gurtej Singh of Patiala.
In the acid attack, two salon beauticians and another bride had also suffered burn injuries. They are reported to be safe now.
Two days after the attack, the police had also recovered the car used in the crime.