Late Congress leader ND Tiwari's son Rohit Shekhar Tiwari died an "unnatural death", an autopsy report revealed three days after his mysterious death in his south Delhi residence.
According to Deputy Commissioner of Police Vijay Kumar, the 40-year-old died due to smothering. Other contradictions were also found, he said. The case has now been transferred to the Crime Branch.
Rohit was declared "brought dead" by the Max Hospital on Wednesday after his mother took him there in an ambulance.
The forensic and crime branch teams visited Rohit Shekhar's residence in Defence Colony to corroborate the sequence of events, including scanning CCTV footage.
A Crime Branch officer told IANS that they have registered a case of murder in this connection.
"His mother, brother, wife and four servants are being questioned," the officer added.
Born out of wedlock, Rohit fought a six-year-long paternity battle with his late father, after he refused to accept him as his biological son.
On April 24, 2014, the Delhi High Court, declared Rohit Tiwari's biological son. While passing the order, the court took into note the report of Tiwari's DNA test, which proved that Rohit was indeed his son.
Tiwari later married Ujjwala in Lucknow.
(With agency inputs)