Is it known that "Nah" is the answer to those questions?
Watching and listening to the body cam video/audio of the police interview of Alex as well as that of the officer walking through the home and speaking from time to time to other officers, my impression was that they were not buying the story Alex was telling or the manner in which he was telling it and they were not pleased with all that had already happened in terms of the scene getting away from them (LV and TR leaving in the middle of events leading to the shooting, AxC shooting rather than calling police, AxC taking his time calling and not administering CPR, LV attempting to interrupt the questioning of AxC, and the presence of a minor child at the scene - TR).
From what I observed on the video, it seems they quickly declared the scene a crime scene, taped it off, and were keeping others out. One officer mentioned that CIV or CIB (Criminal Investigations Bureau?) was on its way. One of the officers inside could see CV was gone and the EMT's administering CPR were not succeeding in attempts to revive him and declared, "Bag him" as though he'd been long gone. And more than one officer mentioned the multiple shots used to kill Charles. And the officers didn't seem to be mentioning the number of shots offhandedly, their manner seemed to imply it was "overkill." None of the officers seemed willing to simply take AxC's or LV's statement about who the victim was at face value; they were actively looking for independent verification (CV's ID and his wallet which likely contained it).
So, at least early signs were that they recognized there was something much more serious than they were being told and they were attempting to protect the scene, presumably to gather evidence from it.
Does anyone know how long the officers processed the scene before turning it back over to LV?