I live in a rental now that a shelf in the fridge was broken when we moved in, so to say they don't explode on their own is kind of accusatory in this case. The OP has admitted to breaking the most expensive item on her list I don't see a reason at this point to accuse her of lying about breaking a shelf in a fridge. Especially since buying a replacement shelf can actually be pretty cheap depending on the fridge.
As a evidence guy my comment on this is who took it? how is it authenticated? Where did you find it, if it was taken "before" you moved in? Is there a date and time stamp on it?
I don't know about all states that require a walk through but I think we can agree that pretty much all states require an itemized list of charges made at move out (in my case the state requires it as long as rent is paid up). As well as having a time frame in which the landlord has to provide that itemization to the tenant, in most cases as far as I know 30 days (the longest I've personally seen is 60 days). And if not; once sued the tenant can receive not only the amount of their deposit, but another fee because of the landlords negligence or unwillingness or whatever you want to call it. Again this gets into different state tenant/landlord laws so your best looking this one up.