Warren was personally involved in several aspects of the investigation.  He supervised four days of testimony by Lee Harvey Oswald's widow, Marina Oswald, and was widely criticized for telling the press that, although her testimony would be publicly disclosed, “it might not be in your lifetime.”  He attended the closed-door interview of Jacqueline Kennedy and insisted on participating in the deposition of Jack Ruby in Dallas, where he visited the book depository.  Warren also participated in the investigation of Kennedy's medical treatment and autopsy.  At Robert Kennedy's insistence, Warren handled the difficult task of reviewing the autopsy photos alone.  Because the photos were so gruesome, Warren decided that they should not be included in the Commission's records.