There's speculation on these threads that the killer changed clothes. Perhaps they didn't change OUT of their clothes after the killings, but INTO some clothes? Just talking basics of a shirt, pants, and some kind of footwear. Wouldn't it be easier for them to bring something like a Hazmat suit, for example (and really I don't know if a Hazmat suit would do it; I'm just using an example) and slip into that afterwards, rather than a shirt, pants, and another pair of shoes or boots that they'd have to lug around trying to get out afterwards? Or maybe they had something like that on to begin with, and they could slip it off afterwards?