Interesting reading some of the sportsnet comments. Some posters want him drawn and quartered.
http://www.sportsnet.ca/hockey/nhl/f...sebastian-aho/
Sedna Andes
“The rules say an illegal hit. Aho's head was the principal point of contact. Take a look at the replay in slow motion. "Beginning with the 2010-11 NHL season, any form of "lateral or blind side hit to an opponent, where the player's head is targeted and/or the principal point of contact" (which is known as an illegal check to the head) became prohibited."