SPOILS IF YOU HAVEN'T READ IT YET--------------------------->Corvus was apart of a terrorist group. That he is apparently still working with even though he is in jail. Yuhto was told by that FBI agent that they had someone who was put into witness protection but the guy was murdered for saying something and right before he died he said that there was a man named Corvus who worked behind the scenes at the jail Yuhto was scent to. They didn't believe the guy (even though he died saying it; so what point would he have lying at that point) so they decided using Yuhto would be best because they had nothing loose by using him. Yuhto recently discovered that the reason they did not believe the guy (witness protection dude) is because the guy claimed Corvus had a burn scar on his back and military experience which is not recorded on Dick's file even though he just admitted to both.
It’s been so long I actually forgot why he’s searching for Corvus. Can someone explain to me please ? ^^