Whitman's autopsy is notable because it found a brain tumor and there has been significant speculation regarding the potential role of this tumor in Whitman's violent behavior. The autopsy says of the tumor, “no correlation with psychosis.” Whitman's biographer, Gary Lavergne, writing in 1997 commented, “in the past thirty years nearly all of the physicians and criminologists who have made themselves familiar with the case have pronounced the tumor ‘innocent'” (p. 268).