Most recently the dossiers where passed to UN chief.
https://www.dawn.com/news/1210439
Even before that, the evidence has been brought up at multiple occasions, one of them was back when the documents were shoved up Manmohans .. at sharm ul shiekh. Other than that Indians involvement has been acknowledged by key people Ex US defense minister Chuck Hagel is one of them.
You are living in a fools world if you think ICJ will get you your monkey back. Pakistans law supersedes everything else.And Pakistan has taken this to ICJ because of its past reputation on such cases. It helps Pakistan exhaust the wildcard and play it whenever it wants. Pakistan will keep internationalizing Yadav and hang him when the purpose is met.Pakistan will make sure his time between trial and death is slow and painful.
And Pakistan never claimed itself to have the "number 1" spy agency.This is usual stuff from the fanboys to make its enemy tremble in fear..