system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If Canada is to legalize marijuana, what would happen to all the folks in jail convicted of marijuana crimes? And what would happen to the arrest records of those arrested for these crimes before it was legal?
gpt
Nothing.  It was illegal when they did the crime, so they are still guilty.  They might then go back and let people out, or commute people's sentences, but that would be a separate piece of legislation to do that.