The GoP is doing nothing different from what the GoI and US are doing - there is no evidence provided to support the accusations of the latter two either.
Case in example, for years now the US media and officials have been ranting and whining about 'Osman is in Pakistan' and then a day ago Gates admits that they have absolutely no clue where he is, and all their assertions are based on 'speculation' that he is in the border regions of Pakistan and Afghanistan.
So asking the GoP to change, when the US and India continue with their own allegations without evidence, is hypocritical.
We have living evidence AM ...Kasab,Daood Gilani,Tawahur Hussain Rana.Even the first dossier of evidence which India sent is now opensource in the net .