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Unfortunately, in these kinds of situations, the police won't get involved because it is unclear to them who actually has the right to the property. As a result, they will call it a private matter and require you to handle it on your own.
So what does this mean for you? If your friend is not going to give your things back, you will have to bring a civil suit against her in court. If the amount of the goods stolen is for less than $6,000, then you can bring a claim in small claims court which is a much easier process than regular court.
To help you get started, Indiana has a manual to help you navigate the small claims process. The manual can be found at the following link: http://www.in.gov/judiciary/2710.htm.
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