Jeff the Killer was just a made up story on creepy pasta. If you're asking if the story is still alive, then yes, people still talk about Jeff on occasions.
Yes, Jeff Bezos is still alive
No, Jeff Goldblum is still alive.
no!
Yes
yes
Yes.
No, Jeff Kinney is alive. He is the author of the "Diary of a Wimpy Kid" series and is still active in the literary world.
No Beth and Jeff are still married and she is alive
Yes, he is. Jeff will turn 50 in 2012.
He is still alive and hiding
no
Nascar driver Jeff Gordon is still alive and well.