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GREGORY MATHESON: Chief forensic chemist with LAPD; was crime l

July 7, 1995

GREGORY MATHESON: Chief forensic chemist with LAPD; was crime lab supervisor at time of murders. Said he didn’t see blood on a sock found at foot of Simpson’s bed until Sept. 18; said Simpson’s blood was consistent with a drop found next to a bloody shoeprint leading from Ms. Simpson’s condominium and, based on prosecution testing, only 0.43 percent of the population would match that blood drop. Said he opened package containing Goldman’s shirt and found a strong smell of mold, which meant the evidence had been improperly packaged; said Mazzola was wrong to collect three blood stains from Simpson’s Bronco with one cotton swab.

Said serology tests showed blood under Ms. Simpson’s fingernails was type B, which doesn’t match Simpson or the victims, and based on that test alone, it could have come from another person; later, said he understood more sophisticated DNA tests done on fingernail blood showed that blood to be Ms. Simpson’s; testified _ hypothetically and over prosecution objections _ that if a preservative were found in crime scene gate blood or sock blood, it could indicate the blood came from a laboratory reference sample.

Repeated his claim that inaccurate measurements and discarded blood would account for the small amount of blood missing from O.J. Simpson’s test vial.

BERNIE DOUROUX: tow truck driver; towed Simpson’s Bronco from Rockingham to police headquarters about 3:30 p.m. the day after the murders; said he didn’t see any blood in or on the Bronco.

ROBIN COTTON: director of Cellmark Diagnostics in Germantown, Md.; testified that DNA in a blood drop found near the two slashed bodies matched that of Simpson; said DNA in a blood stain on a sock found at the foot of Simpson’s bed matched that of Ms. Simpson; said DNA in a stain found in the foyer of Simpson’s estate matched that of Simpson; said genetic characteristics in Simpson’s blood and a blood drop from the Bundy Drive crime scene would occur only at a frequency of one in 170 million blacks and whites; testified that matching characteristics between Ms. Simpson’s blood and blood on a sock found at Simpson’s home at a frequency ranging from one in 6.8 billion to one in 530 billion, depending on race.

Acknowledged quality control test showed minuscule contamination in DNA testing of blood drop found on Simpson’s driveway; said impossible to know origin of contamination.

GARY SIMS: criminalist with the California Department of Justice DNA laboratory in Berkeley; said Goldman’s blood genetically matches blood on inside of right-hand glove found at Simpson’s home, and in another spot appears to be mixed with the blood of Ms. Simpson; said blood on sock found in Simpson’s bedroom matched Ms. Simpson’s; said microscopic examination found about 10 blood splatters on one sock and about 19 on the other.

Testified that three bloodstains on center console of Simpson’s Bronco were consistent with genetic characteristics of Simpson, Ms. Simpson and Goldman; Simpson and Goldman’s DNA characteristics were consistent with another console spot; Ms. Simpson’s pattern was found in a Bronco carpet stain; stains on a gate at Ms. Simpson’s condo were consistent with Simpson’s blood but not with either victim; blood on two socks found at Simpson’s home was consistent with his blood, and one sock had blood matching his ex-wife’s.

Using results of tests from different labs, said odds that blood found near the victims came from a black person other than Simpson were 240,000-to-1; said chances that a blood stain on a sock found near Simpson’s bed came from a white person other than Ms. Simpson were 21 billion-to-1; testified he didn’t understand where Simpson’s blood came from to contaminate the sample picked up on a walkway near the bodies of Ms. Simpson and Goldman; said there was a larger concentration of DNA on blood collected two weeks after the killings from the back gate than in blood collected from other areas the day after the killings. Said Simpson’s DNA matched that found in blood on the rear gate at the murder scene, a sock on his bedroom floor, driver’s side carpet of his Bronco and the driver’s side door mat.

RENEE MONTGOMERY: Criminalist with the state Department of Justice; conducted the bulk of the D1S80 DNA tests done by the DOJ; said her results showed Simpson’s DNA consistent with that in the blood drop found closest to the bodies, two blood drops from the condo walkway and a drop taken from the driveway at his estate; provided a long list of D1S80 results, many of which matched conclusions reached in other types of DNA tests; said none of the stains taken from clothing worn by the victims could have been left by Simpson; said criminalists are always concerned about contamination.

Said wishful thinking wouldn’t change lab results; said she was not told by prosecutors to use defense expert Dr. Edward T. Blake’s name as often as she could; said she had taken steps any responsible scientist would have taken in all of her tests.

COLLIN YAMAUCHI: Criminalist for the Los Angeles Police Department, assigned to serology unit since he started in April 1990; performs serology and PCR DQ-alpha tests on evidence; testified he wore and constantly changed gloves, wore a lab coat and was careful about what he touched; described lab procedures and showed pictures of lab work; said two test results on the Rockingham glove showed a mixture of blood types consistent with O.J. Simpson, Nicole Brown Simpson and Ronald Goldman; said he obtained same results as Cellmark Diagnostics on several other tests; said he thought he knew what he would get when he conducted the tests because he heard on the news that Simpson had ``an airtight alibi, he’s in Chicago, and, you know, it’s his ex-wife and this and that, and, oh well, he’s probably not related to this thing.″

Said tests he did on several stains were consistent with Simpson’s blood type; said tests on Nicole Brown Simpson’s panties showed no semen; testified that he made a numbering error, mislabeling a vial of blood given by Simpson, when he filled out a report, but it didn’t undermine his results; unwrapped the socks taken from the foot of Simpson’s bed and showed them to jurors; said he didn’t see DNA defense expert Henry Lee change gloves while examining the socks at the police lab on Feb. 16.

Said he started doing DNA casework in October 1993 after a training period; said he handled more than six cases before taking on the Simpson case; testified about two of those in court; insisted he was under no special pressure but decided to work into the night to finish his first batch of DNA analysis; said he was familiar with the Amplitype User Guide that recommends limiting the quantity of samples handled in a single run to 15; said he did 23 at once, because ``I think 23 is a reasonably close number to 15.″

Said he remembered while on the stand that he got Simpson’s blood on his plastic gloves while handling a vial of Simpson’s blood on June 14; said he didn’t see anything that appeared to be blood on June 29 when he inspected a pair of socks taken from Simpson’s bedroom; bristled at several questions by defense attorney Barry Scheck, asking the lawyer to repeat questions or review documents; asked Scheck to stop pointing at him _ Scheck said he was pointing at the display screen behind him.

Said he was not worried that defense DNA expert Henry Lee would criticize the police laboratory; said he carried no ill feelings for Lee but considered him a ``nice, congenial″ man; said Lee did not change gloves when he examined a pair of socks found at the foot of Simpson’s bed; said he testified about Lee’s methods of handling evidence because he ``had a good reputation, and he handles evidence in the same fashion that we do.″

DR. LAKSHMANAN SATHYAVAGISWARAN: Los Angeles County coroner; said he chose Dr. Irwin Golden to do the autopsies on Ms. Simpson and Goldman because Golden had been with the department 14 years and had experience with high-profile cases; said Golden made 30 to 40 mistakes, including mislabeling a bile container, failing to find clothing rips, failing to take X-rays and palm prints, but added that the mistakes made no significant difference in conclusions.

Said he believed a singled-edged knife was used to kill each victim and both victims could have been killed by same knife; said Ms. Simpson probably faced her killer for several moments, then hit her face on a wall in a struggle; he said while she was unconscious, the attacker probably killed Goldman, then returned to her and slashed her neck, killing her; said she probably went into shock and died within a minute after her throat was slashed; said the killer was right-handed or at least wielded the knife with his right hand; said Goldman probably lived no more than five minutes after he was attacked; said there were no signs of sexual assault on Nicole Brown Simpson so no reason to conduct a test for sexual assault.

Said Goldman was unable to escape the small yard where he was killed, and could have been stabbed many times in the neck, chest and head in less than a minute; said the swiftness of the killing would have been enhanced if the killer was bigger than Goldman; said the assailant may also have enjoyed the element of surprise. Said he didn’t believe Goldman punched his killer, but injured one knuckle when it struck tree bark or some other object while trying to fend off blows; said knife wounds were found only on Goldman’s palms, not the tops of his hands as would be expected if he had formed a fist. Said he believed Goldman’s attacker poked his face several times with a knife, possibly to see if he was dead or alive.

Said Ms. Simpson and Goldman were killed between 9 p.m. and 12:45 a.m., but that there was no medical way to determine a precise time of death. Said he could not, with a reasonable degree of medical certainty, say how many people were responsible for the deaths or if more than one knife was used; said he could not stake his reputation on the one knife-two murder prosecution theory in the case.

Said his office did an adequate job, not a good job, on the two autopsies.


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