According to Sportsnet:
Boston's Brad Marchand will have a hearing tomorrow for a dangerous trip on Detroit's Niklas Kronwall.— NHL Player Safety (@NHLPlayerSafety) January 25, 2017
Marchand has had his issues with slew footing in the past and has been fined or suspended on two different occasions. He was fined $2,500 during the 2011-12 season for his slew foot of former Penguins defenceman Matt Niskanen, and was suspended two games during the 2014-15 season for doing the same to then-Rangers forward Derick Brassard.The problem for those eager to vilify Marchand for the hit is that many are saying it doesn't really fit the definition of slewfoot. According to the NHL rule book, however, what Marchand did seems to fit the definition: Slew-footing - Slew-footing is the act of a player using his leg or foot to knock or kick an opponent’s feet from under him, or pushes an opponent’s upper body backward with an arm or elbow, and at the same time with a forward motion of his leg, knocks or kicks the opponent’s feet from under him, causing him to fall violently to the ice.