He got buried a bit on the depth chart at UND (understandably with the forward group in front of him...Gregoire, Kristo, Trupp, CVV, Hextall, Malone, Frattin) and was healthy scratched a few games both his FR and SO seasons. So Brandon from the WHL lured him away with the promise of more playing time and expanded roles. He did have a more successful season with them before departing after one season for a less than stellar ECHL career.
I would think Jonny would be able to see the writing on the wall there...that it wasn't anything against David...just that he wasn't as good as the forwards in front of him.
Would hope that the Toews family has no ill-will felt towards UND, especially with how the rest of David's pro career played out.