The theory that Arushi Talwar had been gangraped reportedly gained credence in the course of a narco test on domestic help Rajkumar yesterday.
"Earlier we had some doubts about how and why the murder was committed, but we have a clear picture now," said a police source.

The Central Bureau of Investigation (CBI) brought Rajkumar, domestic help of the Duranis, to Bangalore for a second narco test as the first, at Ahmedabad, had failed. Rajkumar reportedly did not go into a trance in that city, and policemen had to return without questioning him.

According to sources, Rajkumar confessed in Bangalore that he, along with his friends Krishna and Hemraj, had raped the 14-year-old schoolgirl on May 15.

They allegedly entered her room and pounced on her. One of them hit her on the head with an iron rod when she resisted, and raped her when she fell down unconscious.
Hemraj reportedly came to his senses and started shouting at Rajkumar and Krishna for pushing him into such a crime.

Fearing that Hemaj would spill the beans, Krishna and Rajkumar allegedly chased him to the terrace and slit his throat.

After murdering their partner, Krishna and Rajkumar allegedly returned with the khukri (ornamental dagger) and decided to kill Arushi as they feared she would testify against them.

However, they forgot about Shambhu, who was with them at the drink party. At the narco yesterday, Rajkumar reportedly revealed where his gang had hidden the weapons. This is crucial information and would be used as corroborative evidence, an officer said.

A narco confession is not admissible in court, but could help the police gather             evidence.