Investigators are awaiting the final viscera report from Central Forensic Science Laboratory (CFSL) to establish the exact cause of the death of Sunanda Pushkar, Union Minister Shashi Tharoor's wife, who was found dead under mysterious circumstances in a hotel room here on January 17.
The south district unit of the Delhi Police, which is currently investigating the case, has already requested CFSL to expedite the viscera tests in the case which would establish the nature of the poison which led to her death.
According to a senior police official, the toxicology report from CFSL will shed light on what caused the death.
Questioned about the status in this case, a senior CFSL officer merely said, "The process is on".
On January 21, a sub-divisional magistrate had directed Delhi Police to investigate the murder or suicide angle in the case after autopsy report has cited the death as "sudden and unnatural" while the cause of death was mentioned as poisoning.
However, the nature of the poison and the quantity can only be established after viscera tests at CFSL.
Sunanda, 52, was found dead in a 5-star hotel in South Delhi on the night of January 17, a day after her twitter spat with Pakistani journalist Mehr Tarar over an alleged affair with Tharoor.
In a report to the police, SDM, who has recorded the statements of Sunanda's brother, son, Tharoor and his staff, had said that no family member suspected any foul play in the death.
The autopsy report had mentioned more than a dozen injury marks on Sunanda's both hands and an abrasion on her cheek which suggests a "use of blunt force", besides a "deep teeth bite" on the edge of her left palm. Viscera samples were preserved after the autopsy at AIIMS and were sent to CFSL for further tests.
The search and seizure memorandum of the police, which is a part of the report, mentioned finding of mix of two drugs - Alprazolam and Excedrin. Excedrin is a combination of acetaminophen, aspirin, and caffeine while Alprazolam is an anxiolytic.
The case, which was initially handled by South District police as the incident took place in Sarojini Nagar area was handed over to the Crime Branch on January 23. However, the case was transferred back to the South District police two days later on January 25.