If these get jailed, you have no idea what Lebanon and the whole middle east will turn to, it is not that easy to solve it that way, sadly..
Basshar will not let himself or his brother end up in jail, and If they do that with force, and if they try to invade Syria, that will be the end of Middle east, you will see the mother of wars, the ugliest way, from Iran to Hizbollah to Syria.. I don't even want to imagine that.
I know it is not fair and all, but these two sides should forget everything (Even Hariri's death, it is harsh but there is no other way..) and settle this case politically, and start from scratch.. not going to happen probably, so I am afraid we will watch more of these attacks..