Challenge coins have sparked controversy at other police departments, as well. A challenge coin circulated within the Phoenix Police Department celebrated a protester being struck in the groin by ...

These are among the designs of collectible “challenge coins” that have been offered for sale to Louisville Metro Police officers through internal department-wide emails in recent years.

One challenge coin created by a police lieutenant reads, in part, “Hunt the animal” and depicts a knight brandishing a state flag-emblazoned shield. Another features a bulldog in a Maryland ...