The CBI played an intelligent role in nailing Rajesh Talwar and Nupur Talwar in connection with the murder case of their daughter.u00a0



Sources in the CBI said they had sought opinions of four labs for the DNA samples, including one in the UK.
"Three labs said it is not possible as samples are contaminated, while one UK-based lab with which the Talwars were in touch said they could do it but it was found through Interpol that it was not registered there," the sources said.

"After failing to get circumstantial evidence against the Talwars, we tried other ways and in the process found out that the UK lab which we considered for the DNA test of Talwar --u00a0and discussed it in front of the Talwars also --- was in constant touch with Rajesh," sources said.

"If Talwar was innocent, why did he need to contact the UK-based doctor, who was supposed to conduct his DNA test? The CBI has established that Talwar was in touch with the UK based doctor through email," added the source.

Sources also said that certain leads had emerged in the narco-analysis test of domestic helps which were not pursued. He said the CBI made certain observations related to the private parts of the deceased which have not been mentioned in the post-mortem report.

14-year-old Aarushi was found murdered with her throat slit in her parents' home at Jalvayu Vihar in Noida on May 16, 2008. The body of the family's domestic help Hemraj was found on the terrace the following day.