Well sure. We don't have top sheets at my house. But NO sheets (or TOWELS) at all? (The towels are a big deal for me). He showered without towels and this is a new thing?
Okay. So tear up the plumbing (which should be done anyway).
No pillow cases, no sheets (but mattress covers, which are not as easily washed as a bottom sheet, which is why we have bottom sheets). No TOWELS. Apparently no dark clothing, either.
The more that's missing from a potential crime scene, the more the investigators should use simple and basic procedures (such as taking out the plumbing - which has been helpful in many other cases).
I hope he ends up embarrassed by what they *do* find on his mattress cover. And having it revealed to the world that he doesn't use towels (or a shower curtain). Women have had their underwear taken and analyzed (as rape victims - and indeed, I think that's why the defense wanted those mattresses from 1122 King).
Analyze HIS underwear. Or no underwear, either? No dark clothes, no underwear, no towels. If I'm a juror, this does not remove all doubt, but it sure is hinky and makes everything else look even worse. Did he never wash his hands and dry them off? Did he use paper towels to dry? Towels WITHOUT blood evidence would help him, but no towels at all is weird.