You find a body that is "less than a day old." Who killed this man? And why? Alexander's already sealed in the inner sanctum, I suppose we can surmise the grunts or brutes did it, but why would they bring a prisoner to an examination table in the morgue and kill him?

sealing himself away in the Orb chamber. It also brings up the whole "wait how long has it been since human servants have been around?", because someone took that body to the morgue, and I can't picture Alexander personally doing it, and the monsters kinda seem... too dumb? It also opens the question to me anyway, of if a brute or grunt did it... was Daniel aware of these creatures prior to amnesia?

1) The body was fresh enough to have uncoagulated blood (at least enough to inject into the blood) which easily confirms it hasn't been dead "very long."

2) At some point after this person died, he was moved to the morgue by someone or something.

3) Alexander and Daniel were torturing and killing people fairly regularly to harvest vitae, and since we do not find bodies in any of the torture rooms, someone was regularly removing these bodies and carrying them a substantial distance to the morgue.

4) We know Alexander had human servants... at some point. We don't know how long prior he killed or "changed" them.

5) If the monsters (grunts, brutes) had been the ones doing Alexander's "grunt work" (moving bodies etc.) in a timeframe as recent as within the last day or so... wouldn't Daniel have had to know about them prior to amnesia? (And there is no hard evidence that he didn't-- although one would think working alongside magically created monsters of some sort would warrant a journal entry or diary by the meticulous Daniel.) If humans had been doing all the grunt work right up until about the time of Daniel's amnesia, what did Alexander do to them since? Kill them all or turn them all into grunts? Why would he bother doing such a drastic thing only after he'd already sealed himself into the inner chamber and didn't need to worry about them anymore?

Basically: someone/something was carrying on the regular, normal work in the castle right up until "the last 24 hours or so", and if this regular work was being done by grunts, were they just concealed from Daniel before? (He had to know someone was taking the bodies away from the torture sessions didn't he?) and if they were all humans, what happened to them all of a sudden just in the x hours since Daniel drank his potion?

if you take a left down the first corridor, the man is slammed by a brute into the locked door and then killed