The three guys quickly notice the change, but Edward froze them in place before they react.
He made a sharp piece of ice while walking towards them. The climate is becoming colder and colder every second while the respiration of everyone around change, adapting to the cold. Edward didn't need much to kill them now since he wanted to release his rage somewhere, and these guys looked like the perfect targets for it.
Yet, even facing the death of his parents was not enough to change his principles. He would never kill someone without being sure that they deserve it.
That was his choice, but they will have to endure his judgment now, he could be kind, but he is also ruthless when needed. So with the sharp piece of ice, he stabbed the hand of the biggest one.