Almost everyone knows about the trial of O.J. Simpson for the murders of Nicole Brown Simpson and Ronald Goldman. Many people also know about a key piece of evidence introduced by the defense—taped interviews in which one of the investigating officers, Los Angeles Police Department detective Mark Fuhrman, used racial slurs. Less well known is the legal mechanism that the defense team used to obtain the tapes, which were in the possession of a North Carolina writer who refused to turn them over voluntarily. How did O.J.’s lawyers compel a resident of North Carolina to produce the tapes in faraway Los Angeles, California? This post reviews the procedure used in the O.J. case and other ways to obtain out-of-state materials in a criminal case.