I myself fell victim to this bug. You can press the USE key in front of the scientist, but he just looks at you for a split-second before shifting his attention to the dead Security Guard again. Killing the scientist will revert him to standard ragdoll behavior. Not exactly game-breaking, but a bug nonetheless.
Gotta love that magnum. It’s never failed me to this day.
There’s nothing in the world quite like a great skybox.