Simpson prosecutors say they could complete their rebuttal as early as today. In testimony Wednesday, Justice Department scientist Gary Sims said that three bloodstains he tested from inside O.J. Simpson's Bronco match the blood of Simpson and Ronald Goldman. Also, Johnnie Cochran confirmed that the defense plans to call FBI agent Frederick Whitehurst, who would testify that FBI lab personnel have fabricated evidence to help prosecutors in other cases. Judge Ito has not yet ruled on whether Whitehurst will testify. Justice officials today said they are investigating Whitehurst's allegations.