A childhood belief about criminals

One day, while my mother was driving I heard on the radio that there had been a shooting and that a certain man was helping the police with their investigations. I said to my mum "aww, that's nice". She nearly drove off the road through laughing so much. You see, I'm from Barbados, and the above phrase is used euphemistically to describe an arrest, whereas I thought some nice man from the village was taking the police around, introducing them to everyone etc