Evander Kane achieved his second goal of the night on a penalty shot following a controversial call.
After Michal Neuvirth made an initial save on Dustin Byfuglien, he had some difficulty locating the puck as it sat in the crease, The puck was eventually punched out by Mike Green, but the referee ruled that Green's clearance was an illegal hand pass.
Kane stepped up on the ensuing penalty shot and made the Capitals pay by using plenty of head-fakes to elude Neuvirth and extend Atlanta's lead to two goals. They have now scored three goals unanswered.