There are some proprietary databases of criminal histories which collection information on a nationwide basis from many different sources. This is known as a national criminal database. There are no publicly maintained “national” criminal databases from which the general public can access. Some background screening companies maintain private or proprietary criminal history databases, and others will subscribe to third party aggregators of criminal histories. County searches are very pointed specific searches in a courthouse of the county in which the subject of the search may have works or resided. It is a search of one courthouse’s records. While a national criminal database can be considered to be “an inch deep and a mile wide”, a county courthouse search is “a mile deep and an inch wide.” A federal criminal search covers federal crimes that are federally prosecuted and typically not included in either county or statewide criminal checks.