1. A system for locating content items in a plurality of content sources across different content servers, the system comprising: one or more processors; a memory coupled to the one or more processors; and an e-discovery client application residing in the memory and comprising computer-executable instructions that, when executed by the one or more processors, cause the system to: receive query parameters to define a query associated with a source specification of a pre-established case dataset, the source specification identifying a remote content source containing searchable content items; save the query as a query specification in the pre-established case dataset; execute the query of the saved query specification including applying the query against the searchable content items in the remote content source that is identified within the saved query specification by the source specification associated with the query; receive data regarding content items located through application of the query; aggregate query statistics based on the received data; and present the query statistics.