Kane delivered a clean, but bone crushing hit on Wild defenceman Jonas Brodin, causing him to leave the game with injury. It may have looked like Kane laid a dirty hit, but the department of player safety ruled after the game that Kane would receive no suspension. However, that didn't stop the Wild from trying to enact revenge.
It's a tough accusation from Kane, especially in the wake of recent events in the hockey world. There doesn't seem to be video of the alleged incident, but if there was, the NHL would likely investigate and make a suspension. Since there doesn't seem to be much more coming on this, perhaps Kane is exaggerating an incident.