well, I think i have heard several reports from people that their maids have stolen some expensive items from them. I guess in your situation you are better off calling the police, if you are lucky the police might be able to get a search warrant for her place incase she still have them. But keep in mind that you really have no physical evidence that supports your claims.

I also think that it is very uncommon for some random people to go in people's houses and steal their stuff.