Children's chapter book series about a frog and mouse police force in the forest. A little too obvious with lessons and morals. Translated from the original Swedish. 
 This third series installment isn't as good as the second book, A Complicated Case, for two reasons. The warmth of the friendship between the two police detectives is missing. Also, the mystery isn't at all mysterious since readers know all along who is visiting the police station and where the two missing children are playing. Even young readers need some suspense, especially in a book that is supposed to be a mystery.