Helper getting things

Hi! We believe we have been robbed by our helper. But we have no concrete evidence. She is the only one with access to our house and rooms inside. We confronted her but she denied. It's entirely impossible that someone got inside our house by forced entry. I want to get my things back as they are very important. If i report this to the police, is there any chance that she will become the primary suspect?
I live with my sisters and they are missing some of their stuff too. We are still talkig to her through text messaging but she is not replyig. We are trying to make her return it and threaten her that we will report this to the police. But, do we have grounds against her?
Thanks!

You have no hard evidence against her, unless you can make her tell the truth.

She will be innocent until proven guilty.

Thank you for the reply!

Most welcome.