1. A method of suggesting custodians subject to a litigation hold, comprising: receiving a set of keywords or queries; identifying, by one or more processing devices, a set of documents relevant to the set of keywords or queries; determining, by one or more processing devices, a custodian associated with one or more documents in the set of documents; and providing, by the one or more processing devices, the determined custodian to a user as a candidate for a litigation hold.