The gang of men charged with the rape and murder of an Indian woman deliberately tried to find a woman to rape and kill, according to a police report.
Five men, along with a teenager who says he is under 18, gathered for dinner at a dwelling in a south Delhi slum on the evening of 16 December and there hatched the plot to find a target, according to the dossier given to court by the prosecution.
The accused "decided ahead of time" they would look for a woman and "intended to kill her", the police report claims.
The file, which runs to more than 600 pages, contains the prosecution's evidence in the case, which it describes as including forensic evidence against the men, along with confessions, witness statements and medical reports.
However, defence lawyers assigned by the court said the prosecution's case is marred by lapses in the investigation, not least the long period during which their clients were without legal representation.
The defence has not yet filed its reply to the prosecution's dossier.
The court hearing the case took cognisance of the police document, known as a charge sheet, on Saturday. Under Indian law once a court takes cognisance of a charge sheet it becomes public record.
The gang boarded a bus that the alleged gang leader, Ram Singh, drove by day to ferry children to school and went out in search of a victim.
They found the physiotherapy student accompanied by a male friend. They were looking for transport home after watching the film Life of Pi at a South Delhi shopping centre, according to the report submitted to the court.
Police arrested Mr Singh the next day after tracing the bus using security camera footage from a hotel.
He was still wearing a t-shirt stained with the victim's blood and "on sustained interrogation" confessed and led the police to his accomplices, the police report said.
The other accused are Mr Singh's brother Mukesh, Akshay Kumar Singh, alias Thakur, Pawan Gupta and Vinay Sharma, all of whom are expected to plead not guilty when the trial begins.
Mukesh Singh claims he was tortured while in police custody, his lawyer said.
A sixth member of the gang, a teenager, is being processed as a juvenile, and has not so far been charged.
Police have said they are conducting bone tests to determine his age as they suspect he may be over 18.
After being caught by police, Ram Singh produced two bloodied iron rods from the bus, which had been used to beat the victim and her friend, and were inserted into her body, causing massive organ damage, the report claims.
According to the police dossier, the accused turned the lights out and took turns driving the bus, while two men held the woman down and another raped her.
She suffered bite marks on several parts of her body, but also fought back and managed to bite her attackers.
Their injuries are part of the case against them, the police report said.
