The top cop also said the political leaders' comments are unlawful and the law will take its own course in the matter.
The petition states that at the tender age of 10, Amir assisted his father and his mother in fighting a militant and got him neutralized in Gaol.
Demanding an independent investigation into the matter, NC spokesperson Imran Nabi Dar said the "self-trial" by police in the form of SIT "stands rejected" by the affected families.
Lateef Magray, father of Amir Magray who was among the four persons killed in the encounter, said the SIT report is nothing less than lies.
It asserted that foreign militant Bilal Bhai and local militant Amir Magray were killed in the gunfight on November 15.
“We are planning to meet Lt Governor Manoj Sinha to request him to return us body of Amir for burial.
Police had said Pakistani militant Haider Bhai, his associate Amir Magray, OGW Mudasir Gul and businessman Altaf Bhat were killed in the Hyderpora encounter.
However, families of Amir, Mudasir and Altaf rejected the police claim and alleged that their wards were killed in a staged encounter.
An NC delegation led by its provincial president, Kashmir, Nasir Aslam Wani visited the families of deceased civilians Altaf Ahmed Dar and Mudassir Gul.
Shamshad Shan welcomed Jammu and Kashmir Lt Governor Manoj Sinha's order for a magisterial probe into the encounter which took place in Srinagar on Monday evening.
22-yr-old Aamir was among four killed in Hyderpora encounter; shutdown in Kashmir Valley to protest the killings
The group also condemned the statement of Chief of Defence Staff Gen Bipin Rawat endorsing the demand for the public lynching of terrorists.
“The incident calls for a time-bound judicial probe so that facts are unraveled and brought in the public domain,” reads the letter written by the head of the alliance Farooq Abdullah
According to police, four persons, including a Pakistani militant and his local associate, were killed in the encounter but the families of the three locals claimed that their kin were innocent civili
Most of the shops, fuel stations and other business establishments in Srinagar were shut, the officials said.