I would think it wise to wait until the full investigation and prosecution of all perpetrators is complete and the case is considered closed before demolishing a crime scene. For some reason, I actually found it slightly odd that she is pushing so hard to have the house demolished asap. MOO.
Unfortunately we simply can't go tearing down every house that a crime was committed in. Murders happen every day. Are we going to tear down the house in Ajax where a mother and two daughters were just murdered? Yes it was done in the Brenardo case, but the circumstances were a little different. As I recall his leased car was crushed as well. The horrors that happened in that home were documented and the world knew exactly what happened to French and Mahaffey. In this case we don't even know that Rori was killed in the house and we don't know how she died. Also, one has to consider the situation of the owner. The person that owned the Bernardo home was stuck with a home that would always be undervalued due to the stigma attached to it, and it made more sense to demolish it and redevelop. In Oshawa its a different story. The house in the middle of four adjacent properties owned by a single person. The value is not in the structures, its in the sizeable piece of land that she could one day sell to a developer. She is not likely to sell that middle property without the other three being included in the deal. So if the city wants to tear down that house its going to cost big time. Never going to happen.