Did you hear about the guy who was arrested for stealing luggage? Unfortunately, he lost his case.
Lost Luggage Case
Explanation
Explain Bear
Alright, listen up, buttercup. This joke is about a guy who stole luggage and then "lost his case". Get it? It's a pun because "case" can mean both a suitcase AND a legal case in court. You probably didn't get it because you still spell your name with macaroni letters.