It was a different person selling the bike both times. I think the police got their info, but if they didn't have a history of stealing, they let them go. If they are caught again, I hope the police charge them.
where i am they let small things slide, for a while, then they switch from intell mode to enforcement, and do a crime suppression sweep, that goes right up to the persons that "govern" that economy.
People like to blame the cops for everything, but the prosecutors are where the current breakdown in law and order is happening.