[SPOILER] Gaunter O'Dimm Theory

Theory on how Gaunter O'Dimm killed the professor/ other victims.

We saw he could manipulate time, as he put a spoon into a dude's eye. I guess that he wanted the professor dead for spilling info to Geralt. He initially paused time, walked in and tipped the bookcase to kill the professor. Geralt stopped that from killing him. Then Gaunter saw the professor take a step back out of fear, paused time again and placed an object the would make him fall and hit his head.