I'm stuck in Brother 3's tower, I think that's what its called, Abby's said I need to find 2 keys's, found 1 on a dead soldier or maybe he was a tech NAZI, either way, the only good NAZI is a dead NAZI in this game, but following the mini map to where it's says it there, but I find nothing, I go back up the stairs and to the room full of filing cabinets, I follow the trail again, but it stops some 8ft from the target, I check the video walkthrough of what I'm supposed to do, unfortunately it's seems for the PS4 version, similar to my PC version, but just off a little off in certain points, sadly this seems to be one of those, it's no help, I've gone back to the elevator and down to the previous level to see if I missed it there to no avail, I've wandering this level for so long looking for this damn other key, all the dead NPC's have disappeared, I don't know what else to do, Please help! Oh, and I skipped the first 3 or 4 missions figuring the cheats would help and this mission had the most reward in terms of XP and leveling up, if that matters.