Quite. That's what leads me to believe they have/had a suspect or two even back then. Or at least some type of leads to where they don't need everything out there so they can catch someone in a lie.
The other thing I was thinking was, what if this person was in there to simply cause minor vandalism over some grudge, thus the half-assed movements and pace, but then was interrupted and darker stuff went down?
Really hard to know what to think though, with so little information. If I recall correctly (it's been a couple months) it was insinuated in the podcast that they have things on camera NOT released to the public - maybe not the murder itself, but other footage.