Some of those results were first reported by The Times in June, before [Nicole Brown Simpson]'s preliminary hearing, and those results later were presented to a grand jury that month. At that hearing, a police analyst testified that preliminary DNA tests of blood recovered from Simpson's Ford Bronco, the foyer of his house and the blood trail leading from the bodies all matched Simpson's blood.

Peter Neufeld, one of two defense legal specialists on DNA testing, questioned the California Department of Justice expert at length, suggesting that tests being conducted may needlessly risk destroying certain samples before defense experts can test them. Neufeld, one of the nation's premier DNA legal specialists, also detailed questions about handling of samples by police analysts-part of the defense effort to discredit the blood samples and to suggest that the investigation of Simpson has been marred by sloppy work.

PHOTO: Prosecutor [Marcia Clark] and defendant [O.J. Simpson] at Monday's hearing concerning DNA testing.; PHOTO: Courtroom Science: Prosecutors and lawyers for O.J. Simpson tangled in court over DNA testing. The hearing marked the latest in an escalating series of battles over what may prove to be the most important evidence in the case of the football great charged with a brutal double murder. From left, lawyers [Gerald F. Uelmen] and [Robert L. Shapiro] with Simpson at the hearing. / RICK MEYER / Los Angeles Times; DRAWING: Splitting the Samples, KEN OELERICH / Los Angeles Times; CHART: Splitting the Samples, KEN OELERICH / Los Angeles Times; TABLE: Splitting the Samples, KEN OELERICH / Los Angeles Times