"We have taken the help of psychologists and psychiatrists in investigation so that they can help us tie up the loose ends," said a senior police officer.
The team has also spoken to the woman to help her recall the details of the incident coherently, he added.
Police are also working to determine whether all the accused were present in the hotel during the two days as it appeared that some of them had been present somewhere else, he said.
Earlier, she had said that she was not satisfied with the probe and was ready to come to India to identify the accused.
On December 8, the tourist guide, accused of raping the woman, along with his accomplices, was questioned by police after his arrival from Nepal.
Police had identified the man and contacted him while he was in Nepal.
The tour guide had denied his involvement in the matter and told police that the victim had given him a positive feedback in the forms and internal inquiry by the travel agency hadn't found him guilty.
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