http://battlelog.battlefield.com/bf3...1057338353/pc/

That's a link to his profile. People were saying he had a mod hack but I am not sure of that, the thing that did seem fishy was how he magically knew where everybody was. Couple of times a teammate would be completely hidden without moving and he would just go kill them.
I didn't think he was doing anything but it seemed very weird that he just knew where people were.