So basically, despite the fact that I was give a pistol by Amata, and despite me killing the guard outside, I neither see the weapons nor their ammo. So now, I'm stuck, and have absolutely no way of continuing the game. Any ideas as to what I should do? Reloading does not help. I'm pretty sure I was given the pistol, and picked up the ammo and police batons from the corpses of the guards I DID manage to kill with my bare hands. But they are just not found anywhere in my inventory. What am I doing wrong?
I am running the game on Windows 7 64 bit, Intel HD 4000 (the Intel fix found on Nexusmods did the trick for me).

I went back to an earlier save, and the gun was there this time. So I'm going to close the issue, if I can.