This makes me wonder if Luke visited the old homestead when he returned to Tatooine during Return of the Jedi. And were the corpses still there? I mean, he appears to have scampered without burying them.
Or, if the local constabulary found the bodies, is there a warrant out for Luke?
I can see the Tatooine Times headline:
LOCAL COUPLE FOUND MURDERED. REBELLIOUS NEPHEW MISSING, SUSPECTED.
It's a wonder he didn't get nabbed the minute he set foot on-planet.