does he know who really killed JFK? 
Even if it hasn't been stated who he thinks...erm...knows.. killed him; if you can just put a scan of some time where it is hinted that he knows.  
Thanks a ton:)

It was Oswald and if we can figure that out Batman can figure it out.  

No he dosen't know cause he wasn't there at the time so he wasn't able to gather any evidence or talk to any witnesses, and cause so much time has past and any and probably all real evidence would be long gone by now.
 
also their were 3 rifle shots that day and the one they say oswald shot would of entered the back of his skull, but if you watch any fotage of his death his head gets knocked back after being shot, so the bullet that killed him didn't enter the back of his skull their fore it's possabile that it wasn't oswald that killed him

I dont see why this would concern him.  He is interested in solving crime, not solving historical riddles or mysteries.  Unless the criminal is still out there somewhere I guess.  

No, but Riddler probably knows. 

It was Bucky

"It was Bucky "

" @GamiSB: First of all, you didn't figure anything out. Second, it wasn't Oswald. I've done a thesis paper on this and it is obvious it wasn't Oswald. Stop being a puppet to he government's lies. "