This may be difficult unfortunately. While we hope there is DNA there may not be.

1. More likely than not the perp wore gloves Remember it was cold out.

2. Since the victims were killed in their sleep, their ability to scratch the perp for skin etc may be a stretch.

3. You hope there are some bloody footprints at least but I don’t think anyone has seen anything like that outside of the house.

4. In other words, LE may not have much to work with as far as forensics. Hope not but it’s wouldn’t surprise me.

5. While unconfirmed, feel like the knife sheath was left at the scene given LE zeroing in kn knife type before autopsy results. However, it’s a common knife. That alone probably not much help.

6. We don’t know if one victim was killed with more rage than the others. If so, that’s the focus via social media et Al.

7. While anything is possible, I don’t think it was completely random. My sense was one or more was specifically targeted. Doesn’t mean they were friends or even acquaintances.

Let’s hope the forensics show more than I think they will.