One of the coolest resolutions of Joe Chill's involvement was actually done in vol. 2 of the Batman Adventures comic, based off of BTAS.
In it, Chill is still a two-bit nothin' who's been living in fear ever since he killed the Waynes. Around the anniversary of that famous, unsolved crime, a TV journalist does a news story on the double homicide and Chill watches from his crummy apartment as a GCPD detective says he's ressurecting the cold case to obtain DNA off of old evidence. Chill immediately becomes paranoid.
He's also portrayed as possibly schizophrenic and maybe a tad senile. He starts seeing Bruce Wayne's face haunt him everywhere. Eventually he decides he's gotta take out this cop or die behind bars when they pin the crime on him.
Batman, of course, is also interested in this detective's findings. He's waiting by the cop's apartment for him to get home when he sees Joe Chill break in. Batman attacks Chill who fights like a man possessed, screaming and flailing his arms. He winds up tearing at Batman's mask and exposing part of his face. Surprise! Its another 'vision' of Bruce Wayne, thinks Joe Chill! He can't get away from that face! He winds up falling from the fire escape to his death.
Batman, on the other hand, never recognizes the murderer of his parents. And that's the beauty of it. In this continuity, the killer is a nameless criminal in Bruce's childhood memories. Here the Bat has him at his mercy, and all he sees is a sad, mentally ill old man. In fact he even extends his hand to help Joe Chill, which the old coot rejects.
The issue ends with Bats conferring with Jim about the events. They've ID'd the old guy. He's a nobody with a short record. Oh, well. Bats swings out over the city he loves, forever a ghoulish gaurdian of the night, never knowing he did indeed bring the catalyst of his broken life to justice, albeit arraigned to a higher court.
I loved this rendition because it comments on the valuelessness of revenge, especially in comparison to the totality of Batman's career which has become so much more important than any personal vendetta.
It gave me - should I say it? -
Chills. 
I'll dfend his opus to the grave.
