Well, we know that one of the places Tylee's DNA was found was on tools in his shed which hadn't been cleaned. I think, if I'm remembering correctly, one actually had a piece of human tissue on it. So given he kept the tools and didn't clean them, the kids were buried in his own yard, and Lori just put most of the kids' possessions in a storage locker, would they have been organised and meticulous enough to acquire other tools for Tylee's dismemberment and dispose of them carefully, in a way that meant they weren't discovered by investigators?
Personally, I doubt it.
MOO