hey folks. newbie here - good to meet you.
I'm having the exact same problem as FWELR, and my copy isn't a rental. I've gone through the mission dozens of times, sometimes killing every guard that I can find, sometimes killing as few as possible. I've waited for Rocco in every location that I can find him, and yet the same thing happens - he freezes halfway down the hallway...he's completely unresponsive.
The last time, I pushed him the rest of the way to the blue arrow, but nothing happens. I guess it's a glitch, but...what now? Anyone know? I'm stumped.