Not impossible, but one of the least likely scenarios IMO: all this done on the quiet but dad still looking for the truth, when he could just let the metter drop. Or a massive cover up involving people beyond the POIs, in Malton of all places, where the victim mother is the mayoress... They say that reality can be stranger than fiction, but this scenario sounds more like the latter to me. Of the two, I find the demolition option more plausible, as well as some Criminal disposal methods listed
here . I don’t know about you sleuths, but a couple of them really jump out at me.
Besides “I hope she was gone before she hit the ground", I can’t get my head round comments like “so we can begin to put her back together again” and “regardless of what’s become of her”