Investigators in Minnesota have released their initial findings about the house fire that killed NHL reporter Jessi Pierce and her three young children. The deadly fire was not caused by arson, the White Bear Lake Fire Department said in an update on Monday, March 23. "Our priorities are, first and foremost, being present for those directly affected by this tragedy, conducting a thorough investigation, and ensuring our first responders involved in this incident heal alongside the community," the department said in a statement.