Just curious where did you learn and how you know that he was innocent?Living in Pakistan was not crime enough to hang him after 21 years of imprisonment.
Your justice is if Pakistan is not going to surrender Tiger Memon, then India will hang his brother who was not involved.
In fact, India and extremist Hindus have to pay for it as this thing is making large population of Indian Muslims angry upon extremist BJP government and even upon Indian Justice system.
I have nothing against if India capture and hang the real terrorists, even if they are in Pakistan. But if you hang an innocent, then you are wrong.
Also what you mean when you say 'have to pay for it'? Thanks.