South Delhi triple murder: Aspiring boxer slit sister's throat first, stabbed father in the head and then ambushed mother

NEW DELHI: More disturbing details have surfaced in the gruesome triple murder of a family in south Delhi's Neb Sarai, where 20-year-old Arjun Tanwar stands accused of allegedly killing his father, Rajesh, mother, Komal and sister, Kavita, in their home.
Arjun, described as a reserved and introverted young man, has left those who knew him in utter disbelief.
“We didn’t know of any tensions between the father and son,” said Gaurav, a former teacher of the siblings. Neighbours echoed similar sentiments, painting a picture of a quiet, disciplined individual who adhered to a strict regime of gym workouts, boxing practice and running.
Although Arjun was not academically inclined, unlike his academically gifted sister, Kavita, he reportedly enjoyed his father’s unwavering support.
“His father bought him a high-end motorcycle and helped him with his diet and exercise,” revealed a resident.
Yet, there were darker moments in his relationship with his sister. One neighbour recalled, “He would sometimes threaten to kill her during arguments, but we thought he was joking.”

Investigators disclosed chilling findings from Arjun’s phone, revealing searches for murder-related content over the past few days, along with research into poisoning methods using sulphas, a deadly chemical.
The young man admitted to stealing his father’s Army knife just a day before the murders.
The sequence of events unfolded with horrifying precision.
According to police, Arjun first attacked his sister when she resisted and bit his hand. “He pressed his hand over her mouth and slit her throat,” an investigator stated. He then proceeded upstairs, where he ambushed his parents. His mother, who stepped into the washroom, became his next victim. After killing his father, Arjun waited for her to emerge, partially slitting her throat before dragging her to the bed to finish the act.
Evidence uncovered by police—including the knife and blood-stained clothing discarded in Sanjay Van during Arjun’s morning walk after the crime—corroborated his confession. Blood traces in washbasins and on the house key further sealed his fate.

The victims bore horrifying injuries—throats slit, stab wounds aplenty. In a grim detail, clothing had been placed around their necks, likely in an attempt to stem the flow of blood.
Arjun reportedly began his killing spree with his sister, who tried to fight back, as evidenced by the injuries on her body.
He then moved to his father, attacking him in his sleep. Lastly, his mother, who had gone to the bathroom, was ambushed as she returned. Arjun used his father’s Army knife to carry out the murders, a weapon chosen for its lethal precision.

A neighbour who witnessed him being brought back to the house for the crime’s recreation remarked, “Arjun showed no sign of remorse. He was as calm as always.”