"His brother Liu woke up, startled by some noise. He didn't hear anything else, so he just shut his eyes and tried to go back to sleep. As he was on the border of slumber, he got the strangest feeling that someone was watching him. He looked up, before Jeff's hand covered his mouth. He slowly raised the knife ready to plunge it into Liu. Liu thrashed here and there trying to escape Jeff's grip.
"Shhhhhhh," Jeff said. "Just go to sleep.""- jeff the killer creepypasta
that's the last paragraph of jeff the killer's creepypasta. The end says nothing about liu escaping nor does it say that he died, we can only assume what happened at the end right? so other story that you see that "says" that liu is alive or dead are theories. we don't know for sure so you can continue to believe that he's alive and i'll continue to believe that he's dead there.
oh and even if i wasn't a theory then what does it matter if i want to believe that he's dead i'm entitled to my own opinion.