Search MXDs for use of feature class

I've inherited a large somewhat messy database and am attempting to clean it up a bit. Does anyone know if it is possible to search a database to see what arcGIS map documents use a feature class? I'd like to delete old versions of my feature classes, but don't know if they are in use in a mxd somewhere. This would also be useful to see what mxds need to be updated because they're using old versions of data. I'm envisioning a search in ArcCatalog that specifies a feature class and returns a list of mxds and maybe relationships that use said feature class.

Any suggestions appreciated. Thanks in advance!