I don't know if he was illegal or not but I know he is neither Irish nor British.
He is a foreign, murderous thug welcomed into a country that has fuck all to do with him or his ancestors and he has decided to repay the generous kindness of his hosts by doing this.
There is no trial needed. The evil bastard was filmed.
Is there a death penalty in Sudan?
If so, ship the fucker back there and insist it is applied.
If Sudan don't like it, then allow no more Sudanese people in, shut down their embassy-if they have one-in and/or stop any foreign aid going to them.
Of course, that won't happen.
An army of eejits-always to be found, just as sure as shit will be found on a cow's tail-will arrive to cry about his rights, his mental health and somewhere no doubt the terrible life he has had.
One day, maybe not too far off, the response to that will be: Who Gives a Fuck!