Another story about the Maid

I came back home a little bit late tonite since i just came back from factory in Sukabumi i m re-filling a water in the bottle in the kitchen and i saw there is a piece of plastic that i know it is a part of cooking oil package
I check in the cupboard, and i found i missed one of 2 liters cooking oil pouch, and i found again there is one package of sugar is missing
There is only me, my husband, Jeslyn, and my maid who come and go everyday (not stay with us), she just work for 3 days
I dont want to make a mistake, suspect on a wrong person, coz i dont check my cupboard everyday, but, there is a strong proof...so...i dont have another choice except fired her, it's too bad.....
If you rely on someone, but you find out that she has a bad attitude, even a small one, you can't rely on her at all anymore, you are talking about your daughter life that you ask someone to take care of her during you go to work, am i right ?