Police sources said the step was being taken following a Ministry of Home Affairs letter reminding it to get the samples back as was asked by the FBI lab since samples were lying there despite a report by the US agency lab.
51-year-old Sunanda was found dead at a suite in a five-star hotel in South Delhi on the night of January 17, 2014, a day after her spat with Pakistani journalist Mehr Tarar on Twitter over her alleged affair with Tharoor, the Congress MP from Thiruvananthapuram in Kerala.
The FBI lab report, sent to Delhi Police in November 2015, endorsed the findings of the AIIMS forensic report. As police could not firm up about cause of the death based on the FBI report, they requested a medical board of AIIMS to analyse the contents of the report.
During the investigation, several persons including Shashi Tharoor have been questioned in connection with Sunanda's death. The police have also conducted polygraph test on six persons, all prime witnesses in the case, including Tharoor's domestic help Narayan Singh, driver Bajrangi and Sanjay Dewan, a close friend of the couple.
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