New Delhi, July 26 - In a rare appearance at an investigation site, Delhi Police Commissioner Y.S. Dadwal 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 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.