Clenching his bloodied hand into a fist in a poor manner of hiding the red, Russell couldn't help but let the complete shock of what he had done seep into his muscles and keep him rooted to the spot. For the time being, as Will was busy taking out the dying man and another who tried to attack, his brain forced him to replay a constant mental loop of what he had done, reminding him this was no video game.
So it wasn't a surprise when it was easy for Will to make Russell go where he needed to: outside and toward safety. Well, outside from one certain danger to a less sure one. His eyes flickered up to Will when he heard him talking, but it barely registered. How could he not let it get to him? Sure he was a super genius and a lifetime criminal to boot, but until ten minutes ago, he wasn't a murderer as well. That was the one thing that always kept him separate, put him on a higher plane than the other lowlifes who were spending the rest of their lives in prison, or worse. Now he was just like them.
Staring at some invisible spot in the far off distance, there was nothing Russell could do but focus on one thing and one thing only: to follow Will wherever he was going.