So I've killed all the Nightkin, and their leader (Davison?) and my quest log tells me to report to John Brigth to tell him the Nightkin are gone. When I get back to the door to the REPCON Research Labs, the one ontop of the stairs and the one I originally went into, it says the door is locked and I need a key. When I use the intercom the humany guy who thinks he's a ghoul tells me to stop messing around with the intercoms and then nothing else happens. How am I supposed to get back in the room? I feel like I'm forgetting something stupid...

not sure if you need to do this part first but I also went down the hidden-ish stairs where you kill Davison and used the intercom so that the human guy tells you to stop snooping, THEN I went and found the ghoul that was stuck in the locked room (that you get the key from Davison to open) and found his friend, THEN went back up