Wow!
This accident is likely tied to the altimeter setting and whether or not it was or wasn't properly reset at transition. (No one's ever missed that before) With help from x-winds and icing.
Another "can of worms" is a Canadian PIC with (presumably) an FAA licence (if in fact, both pilots held them) flying an N-registered aeroplane whose owner is listed as Wilmington, Delaware, from a Canadian airport to a Canadian airport. Under the Customs Laws in Canada, if this was the case, the flight was in violation of the customs act. Meaning, if this IS the case, insurance cover is probably Nul and Void. OMG!
Anyway, my sympathies and heart felt condolences go out to those left behind, especially Mr. Lapierre's mom. May god bless her in this, perhaps her darkest hour.
Willie