HB sez 'why he would get rid of the body and the mattress, but not the knife'?
Maybe a mistake on his part? But hey, the guy was so dumb he hurried out and bought a mattress thinking no one would ever find out! So maybe he "hid" the knife there believing no one would find it. Glad they do have the knife, though.
I have said before, they say DNA evidence is more difficult since Lori was adopted; well, didn't her mother keep a lock of baby curls from Lori's first haircut or her baby teeth? We have those items in sandwich baggies, stapled in the kids' baby books. I thought everybody kept at least one memento?
Scroll on Fox says Mark has volunteered new information. Doesn't say when or who Mark spoke to.
I would find it hard to believe they don't have some kind of DNA evidence... even hair from her hairbrush or something. And since she'd just found out she was pregnant, isn't it possible that her doctor has something from tests that could be used as well?