How would we know? It was rejected. Note that when Pakistan denied Kasabs Pak connections, the Indian government provided evidence to support its claims. Amazing thing, evidence. Holds up in courts of law.
So they couldn't give him up to the Hague, then? Yeah he would have ended up in US hands 10 mins later, but the Hague would have first needed to determine that it was legal to do so, which involves seeing evidence that you and I aren't privy to.