RIAA doesn't like independent experts
Though the RIAA has filed lawsuits against thousands of people, many of the cases are settled out of court. Those who defend themselves have found mixed success fighting the RIAA, with results ranging from successfully winning their case, to loosing to the RIAA by default. In a recent case, the defendant has requested that their hard drive be examined by an independent party, much to the dismay of the RIAA.