Please keep him in your prayers. And, whenever you can, talk to people about his plight. Only an upswelling of outrage from America will stop this tragedy.
Oh, and here's what I'd like to do: I'd send NYC policemen and FBI agents into the United Nations with guns drawn and arrest the Iranian ambassador and his entire staff for crimes against humanity. Then I'd threaten to try them in a military commission (a la Nuremburg), seeking the death penalty. Might get their attention.
My old man had a simpler view of these sorts of things. His default position was to tell America's enemies to stop doing X (whatever X was), or their biggest city would "be no more after noon tomorrow." As in, "release Pastor Youcef Nadarkhani immediately or Tehran will be no more."
So, you see, I'm the moderate in our family.