He must have tiptoed through all the blood since he left no footprints and absolutely no forensic evidence was found on him, in WHF or even at his own house. For a foolish man he must have been very smart?
But Sheila easily could have done it without leaving any footprints though she had barefeet and would have cut hers to boot on the stuff on the floor?
Anytime you claim Jeremy would have had evidence the same applies to Sheila is she were the killer. The only difference is she had the additional hazard of cutting her feet and the additiona way of leaving fingerprints because she didn't have gloves though Jeremy did.
Finally, he was not inspected after the murders and could have cleaned up and changes his clothes. She
would have no reaosn to do so.
Her body and clothing was actually inspected for evidence like gunshot residue, back spatter, and injuries, his wasn't. So we can say she lacked any such evidence we don't know whether he did lack such evidence.