With every day that goes by without any kind of ‘break’ in the case, the more I lean towards the killer being some random psychopath with no real connection to any of the victims aside from spotting one/all/the house itself and deciding that was their target.
If committed by a jilted lover, jealous friend, etc. I would assume it was their first murder, even possibly their first violet act. If that’s the case I just can’t comprehend how they wouldn’t make mistakes and leave a bunch of evidence leading back to them. I know it’s possible and has occurred in other cases, but it was a busy night in an area heavily populated by students…how could they walk away after a crime of that magnitude and not be seen? I disagree with the talk of the perp having potentially showered at the house. That seems like an extremely brazen move unless they were 100% sure no one else was in the house or would come home.
IMO the longer this case goes, the more I lean towards it being a random attack where someone has seen either the tenants or the house in general, entered and exited via the cover of the bushland next to the house before returning to his car and returning home. Zero connection to the victims making it very difficult to track. I think this is a calculated individual who has gone to lengths to cover their tracks but also the fact that it’s a known party house has helped them cover their tracks even more by creating confusion with all the DNA LE has to sift through.