Written agreement to Portugal apart, if Abu Salem is found guilty of his henous crime where more than 200 (official count?)people died, which affected thousands of families, directly or indirectly, he should be given the maximum possible punishment under IPC.
It is better to execute this kind of monsters in public than lodge them in some jail and spend lakhs of tax payers money on them for their life behind bars.
Investigation should make public all those politicians who were involved, and bring them to justice as well...but that seems to be an impossible expectation.