On January 10, 78-year-old Sarojini Bartwal had been found smothered to death with a towel in her flat in Mayur Vihar.
Seven months later, the police are still struggling for a breakthrough in the case.
The questioning of more than 200 people by as many as 50 police officers from 10 different teams has yielded little result. That is why Bartwal's family members - including her only son Hemendra, who works as a political advisor to the British High Commission - feel that the case has hit a dead end.
Bartwal's murder was the first blind murder case to have been registered in the new year of 2012 at that time and had generated a lot of interest.
The investigators had taken it up as a challenge. Every possible angle, including robbery and property dispute, was looked into, but nothing could be established. So much so that the police have even been unable to zero in on a motive, leave alone finding the identity of the killers.
This, when apart from the east district police, teams of the crime branch too had been roped in to solve the case. At present, the case is being handled by the special staff of the east district.
Speaking about the progress of the case, Hemendra said the investigators had been quite hopeful of a breakthrough in the initial few months.
"Their efforts were really appreciable, but at present, nothing much is being done. However, what is surprising is that the killers came and went undetected, leaving behind no evidence," said Hemendra. However, he has not given up on the Delhi Police yet.
Born in Jabalpur, Madhya Pradesh, Bartwal was known for her critical pieces on music. She had been associated with music maestros such as Pandit Jasraj, Beghum Akhtar, Pandit Dilip Chandra Bedi, who was also her guru, and Girija Devi.
She had also worked as a music critic for Nav Bharat Times in her 40s and had recorded a few shows for All India Radio.