The Simpson defense released the name of the "mystery witness" they hope to call. He is Frederick Whitehurst, who testified last summer at the World Trade Center bombing trial that the prosecution in that case tried to pressure him to change his testimony. If Judge Ito agrees to let him testify, he is expected to challenge the FBI laboratory analysis of blood allegedly belonging to O.J. Simpson and the victims. In testimony today, Justice Department scientist Gary Sims said that three bloodstains he tested from inside Simpson's Bronco show a combination of blood consistent with the blood of Simpson and murder victim Ronald Goldman.