Bicycle detail

My 13 year old son wentr into Menchies to get froyo and left his bike right outisde the door, but behind some big potted plants in somewhat of an allyway. He was in there for about 5 minutes and when he came out it was gone. His freinds bike was still there, whcih was a smaller bike. There was an electric scooter parked ther as well (unrelated) and he said that was gone too. My son had the bike for three days. We will definitely be talking about locking it up when it is returned, or when he gets a new bike. We live in a super safe area where kids leave there bikes parked out at this location ALL OF THE TIME.