In a rare appearance at an investigation site, Delhi Police Commissioner Y S Dadwal mon Sunday inspected the spot where a close aide of Himanshu Sabharwal, son of slain Ujjain professor H S Sabharwal, was found murdered in the capital three days ago.
However, police are yet to make any breakthrough in the case.
Dadwal, who was accompanied by Joint Commissioner of Police (Northern Range) Karnal Singh and Deputy Commissioner of Police (North Delhi) Sagarpreet Hooda, inspected the crime spot near the Khalsa College in Delhi University north campus where Parminder Singh's body was found with multiple stab wounds late on Thursday night.
Singh worked as an accountant with Himanshu Sabharwal, whose father was killed in beatings and assault by students in an Ujjain college in Madhya Pradesh three years ago. A court later acquitted six activists of the Akhil Bharatiya Vidyarthi Parishad (ABVP), the students wing of the Bharatiya Janata Party (BJP), accused of beating Prof. Sabharwal to death, for lack of sufficient evidence.
Parminder Singh was last seen with Himanshu, freelance journalist Pooja and students leader of Ramjas College Saif.
Singh along with Himanshu and Pooja had gone to put posters for a gathering and a candle light vigil called 'Justice for Professor Sabharwal' on Sunday.
The police, who have already announced Rs 50,000 reward for those providing clues to solving the case, are now questioning Himanshu, Pooja and Saif.
Dadwal also asked Delhi Police's elite Special Cell and Crime Branch for coordination and assistance with district police to solve the murder case.
"We will not comment about who all are suspects. We are yet to reach any conclusion and the matter is being investigated," Karnal Singh told reporters when asked if Himanshu was a suspect in the case.
The police had questioned Himanshu twice so far to corroborate sequence of crime and ascertain various facts.