SPOILERS ONCE MORE!
Wasn't Orlando put in the slammer for a short period in time due to him being sussed? (My memory is foggy, but I'm for certain that he'd been watched for a while by the police). Not only did Orlando get in trouble by getting the blue men involved which Memphis already dislikes, the murder was almost not in Memphis' interest. I probably didn't make this idea of a "test" clearer.
I'd think this test Memphis tasked Orlando is to try and desensitize him to the point of seeing corpses don't startle him no more, doing the deed and KILLING someone, but overall, doing all of that without getting caught in any way. (Poisoning the food was a bad move since he's mostly the one cooking)
This is probably why I think Memphis just sent Orlando away in Bad Dean Ending to work at a bakery. Just so he can distance him. Memphis could've easily gunned Orlando down but, as a semi-pass for his test, he grants him a chance at life.
Plus it's also suspicious to me that Orlando is the only one ALSO messing with the vault, other than Dave. No one else toggles with it. Literally just him. For all I know, I think he's the one that narced on Jack/Anyone else when we revealed Oswin. That's probably how Oswin died. Orlando was the one that leaked the info.
I even think that Orlando is faking his "Password". He's saying that he saw Dave hanging in a meathook in a rundown place. Not only is he trying to make Dave believe he's protecting him, HOL' UP! Where is the other RUN DOWN place we saw throughout the game? THE MILL. And who do we meet there? Jack!
Just more proof that Orlando may be a baddie
(Also hi Grizz!)