He also alleged before the court that there were "gaps in the probe including destruction of evidence" and said that he would show that international laws would apply to the case.
A bench of justices G S Sistani and Sangita Dhingra Sehgal, however, said that "what was left out cannot be added, unless we go for a re-trial" and asked Swamy, the State of Uttar Pradesh and other parties in the case "to take a call whether you want a re-trial or an appeal".
On NHRC's application for enforcement of the trial court order awarding compensation to kin of some of the victims of the massacre, the bench today sought response of Uttar Pradesh legal services authority after DSLSA said that crime occurred in that state.
Delhi State Legal Services Authority (DSLSA) also said that the victims belonged to the state and the accused were police officers of UP and added that its funds were "limited" and "meant for people of Delhi".
The NHRC, in its application, has sought enforcement of the trial court's order to pay compensation to kin of some of the victims under section 357A of the Criminal Procedure Code (CrPC) which provides for payment of compensation to the victims even on acquittal of the accused.
On March 21 last year, a trial court gave the benefit of doubt and acquitted 16 former Provincial Armed Constabulary personnel accused of killing 42 people in Meerut in 1987, saying lack of evidence has failed to establish their identification.
In his plea, Swamy has also challenged the trial court's March 8, 2013 decision dismissing his plea against Chidambaram who was the Minister between 1986 and 1989.
Swamy has sought further probe saying, "It was admitted on the floor of Parliament by the then Minister of State for Home Affairs P Chidambaram that the situation was calm on May 19 to May 22, 1987.
