You're an ace investigator today. First, there's the case of the disappearing teddy bear, which scores major points with the kiddo. The fact that you figured out who took the last cookie from the jar -- not so much.
Get Down to Your Child’s Level
You should look at the closet from your child’s perspective. Most closet bars and shelves are at an adult height, which makes it difficult for your child to put things away on their own. You may want to consider lowering the bar, adding a second bar, or even adding additional child-height shelves.