Oshie was actually in the crease. Skating thru it and never touched Hakak, but if your looking for help or quick to blame others or hoping for a ref gaffe, Oshie was there.
Very smart play by Oshie. He got about as close as he could without making contact. If that was Williams he would have bumped into Halak and taken away another Ovechkin goal, furthering his campaign for the Selke.