Perhaps you are right. However LE could have arrested the perp(s) on any day since the homicide on a probation violation, etc. if LE was concerned they may flee. That too would explain the silence.
The only thing that would explain the silence is they either know, who did it and need to prove it or they do not have a clue. I highly doubt the latter. Not once did the LCSO approach the public and officially asked for help. Not once did we hear from family-members either asking for assistance.
Regarding the perpetrator sitting in custody for a possible probation violation while we speak, if you look at all the initial charges, they don't come close to the violence in Dr Sievers' case. They are no hit-men and women. They made their own "carrier" choices and are paying for it.
Dr Sievers was attacked with an incredible amount of rage. To be able to release that kind of criminal energy, that kind of violence, that's what we are looking for in the "unknown subject", or "unsub", in the Sievers case.
This individual ( possible more than one) was not only capable and so far organized to gain access to an otherwise electronically secured building in a neighborhood, where people's homes are so closed by, but he was also able to escape seemingly unseen and without a trace. Let's even forget for a moment, that the dogs were not barking and that the straight claw hammer or any hammer would not create that door damage, and that therefore the tool to pry open the side door was a different tool than what DR Sievers had been killed with ( if the "hammer" was indeed the MW).
Anyone with a sound mind would feel nauseous just thinking about a crime like that, and he/she was able to perhaps even stage the crime scene (or not) and leave without vomiting allover the streets, just to step back into every day's life?
This individual may not have a solid record, but there ought to be instances of reported (domestic)violence, disputes or drugs. This individual was not just a burglar and forgot to run away after possibly being recognized by Dr Sievers. This individual either came to help someone getting out of the house, or all is staged and Dr Sievers' death resulted due to an argument getting out of hand.
I know what the suspicions are, but at this time I simply cannot cross that line out of respect for family and the children.
-Nin