NHL Senior VP of Player Safety Brendan Shanahan said the hit was a violation of rule 42.1 (charging) and resulted in an injury to Niederreiter, who is out with a concussion.
"We'll live by the suspension," said Stars GM Joe Nieuwendyk. "I think it's a very difficult job that Brendan Shanahan does and I respect the job that he is doing. We'll live with it."
The suspension will cost Fistric $16,216.23, which goes to the Players’ Emergency Assistance Fund.
Here's the video explanation from Shanahan.