Burnaby Lake Regional Park. Detective Serena, along with others from the Detective Headquarters, had to retrace the lost bunny's route to bring her home.
After careful analysis of clues including fur, scats, gaits, and teeth marks, Detective Serena concluded that Brittany was a snowshoe hare who wandered off to a big leaf maple tree, then sidetracked by the smell of fresh mint and the croaking of a tree frog. Based on the polygraph test, the robin told the truth of Brittany's whereabouts. Case solved.