There is nothing that is factually connected to anyone. Handwriting is not factually connected to anybody. DNA is not factually connected to anyone. When you have the right suspect, then it will become factually connected. You would first have to connect it to someone, and then decide if they were an intruder or not.
What, were you expecting to find "an intruder did this" stamped on the side of the broken paintbrush or something?
Its like Ted Kaczynski, as I see it. Was there any factual connection between his letters and him? No. Not until he was found out. Then a connection was made.
You are right (never thought I'd say THAT) - yet Lacy has "factually connected" the DNA to the "killer". We all know that if you don't know who the killer is- you can't say for sure they DNA belongs to the killer. The DA's office still can collect samples from all the White's male party guests (even the kids) to see if there WAS an innocent transfer. But I bet they won't. Lacy wants to go out as having exonerated the Rs and finding the killer.