I need to vent !!!

So I just noticed a lot of stuff missing from my apartment well come to find out I also noticed my daughter stuff missing well the only other person that has keys to my place was my sister when her and her boyfriend got into a fight she had no where to go so I let her stay with me for a few weeks .... Well tonight I had a feeling I should drive by her place and my daughters dream light was in her back seat !!! Her window was Dow. So I grab it .... I am so very angry ... Almost to the point if breaking into her place and taking my stuff back !!!!