1st of all he needs to get a lawyer,and he has to file to stop the deportation,,but he has to show his returnign to nepal will be danger to his life.since the condition of nepal,, lawless.. ask him to create some sort of story. and that same story has to be present from now on.
by the way where is he detained. what state? and where r u frm or he frm whauch state? do u have any nepali orgination. ask their help.