Han seemingly shot first in the original version, but earlier this year Lucas said the opposite. So queue CSI or Mythbusters on this one.
THR: People can get fanatical about the movies — how does that make you feel? The puppet vs. CGI Yoda ruckus, and the who-shot-first, Han Solo or Greedo furor come to mind.
Lucas: Well, it’s not a religious event. I hate to tell people that. It’s a movie, just a movie. The controversy over who shot first, Greedo or Han Solo, in Episode IV, what I did was try to clean up the confusion, but obviously it upset people because they wanted Solo [who seemed to be the one who shot first in the original] to be a cold-blooded killer, but he actually isn’t. It had been done in all close-ups and it was confusing about who did what to whom. I put a little wider shot in there that made it clear that Greedo is the one who shot first, but everyone wanted to think that Han shot first, because they wanted to think that he actually just gunned him down.