The O.J. Simpson crime scene evidence came from three connected locations: the front walkway of Nicole Brown Simpson’s condominium at 875 South Bundy Drive in Brentwood, Simpson’s estate on North Rockingham Avenue about two miles away, and the white Ford Bronco parked outside that estate. Investigators recovered blood and DNA, a pair of leather gloves, bloody shoe prints, hair, carpet and clothing fibers, and dark socks stained with blood. The prosecution used those items to build a physical chain tying Simpson to the June 12, 1994, killings of Nicole Brown Simpson and Ronald Goldman. The defense answered with contamination, degraded samples, and a planting theory aimed at the detective who found the most important single item. Both the evidence and the attacks on it ended up on trial.
Blood and Items Found at Bundy Drive
Forensic technicians found five blood drops leading away from the bodies along the front walkway and into the driveway. The drops fell to the left of a trail of bloody shoe prints, suggesting the person bleeding had an injury on the left side. Four drops were tested by Polymerase Chain Reaction (PCR) analysis, which amplifies small DNA samples to build a genetic profile; those results matched Simpson at a frequency of roughly 1 in 5,200. The fifth drop, from the driveway, was large enough for the more discriminating Restriction Fragment Length Polymorphism (RFLP) test, which returned a match at 1 in 170 million.
A separate blood sample from the rear gate, logged as Item 117, also matched Simpson’s PCR profile. The prosecution argued he had touched or brushed the gate while leaving. That sample had to clear California’s rules for admitting scientific evidence, including authenticity and reliability of the testing method.1California Legislative Information. California Code Evidence Code 403 – Preliminary Determinations on Admissibility of Evidence It became one of the most contested items at trial; defense experts argued the sample had degraded from days of sun and heat exposure and pointed to what they called unusually high DNA concentrations for a stain supposedly sitting outdoors for weeks before collection.
Three non-biological items near the bodies carried as much weight as the blood. A dark blue knit cap sat in the bushes along the walkway, photographed in place before collection. A left-hand leather glove, an Aris Isotoner Light in size extra-large, was recovered in vegetation along the walkway, saturated with blood. A white envelope near Goldman’s body held the prescription eyeglasses he had been returning to Nicole’s mother from the Mezzaluna restaurant, which explained his presence at Bundy that night.
A former Aris Isotoner executive testified at trial that this glove was a relatively rare model sold exclusively through Bloomingdale’s, that Simpson’s hands required the extra-large size, and that NFL broadcast photographs and video showed Simpson wearing gloves consistent with the model at football games between 1991 and 1994.
Blood and the Second Glove at Rockingham
Detectives reached Simpson’s Rockingham estate around 5:00 a.m. on June 13 and noticed what appeared to be blood on the door of the Bronco parked outside the gate. When no one answered at the house, Detective Mark Fuhrman scaled the wall. The prosecution justified the warrantless entry under the exigent circumstances exception to the Fourth Amendment, and Judge Lance Ito ultimately allowed the Rockingham evidence, finding the officers had acted reasonably.2Justia. Mapp v Ohio, 367 US 643 (1961)
On a narrow, dark pathway behind the guest house, Fuhrman found a right-hand Aris Isotoner Light glove, the apparent mate to the left-hand glove at Bundy. DNA testing on the Rockingham glove revealed a mixture of genetic material from Simpson, Nicole Brown Simpson, and Ronald Goldman. Blood was present on the inside of the wrist, the fingers, and the outer stitching near the wrist notch.
Inside the master bedroom, investigators found a pair of dark dress socks on the carpet. They looked clean, but laboratory examination revealed blood stains that matched Nicole Brown Simpson and Simpson himself. The socks became one of the most hotly disputed items at trial.
What Was Inside the Ford Bronco
The white 1994 Ford Bronco parked outside the Rockingham gate connected the two locations. Technicians found blood smears on the driver’s side door, the interior instrument panel near the steering column, the steering wheel, the floor mats, and the center console. The console stain, logged as Item 30, contained a DNA mixture from Simpson and both victims. Goldman’s blood inside a vehicle he had no known reason to enter was among the prosecution’s most compelling findings.
Investigators also used luminol, a chemical that reacts with trace amounts of blood under ultraviolet light, to detect material that may have been wiped from interior surfaces. The pattern of blood throughout the Bronco suggested someone with active bleeding or blood-covered hands and clothing had driven it shortly after the killings at Bundy.
Shoe Prints, Hair, and Fiber Evidence
A trail of bloody shoe prints on the Bundy walkway mapped the killer’s movements. FBI footwear expert William Bodziak identified the prints as a size 12 shoe made by the Italian manufacturer Bruno Magli. The sole pattern matched a mold used for both the Lorenzo and Lyon styles, which shared an identical sole design. Bodziak traced the sole to factories in eastern Italy and determined that Bruno Magli had distributed the shoes in the United States only in 1991 and 1992. Just 299 pairs in size 12 had been sold in the country. The spacing and depth of the prints showed the assailant moving away from the bodies, along the walkway, and toward the rear alley at an increasing pace. Simpson wore size 12.
Hairs recovered from the blue knit cap at Bundy were microscopically consistent with Simpson’s known hair samples. Similar hairs appeared on the Rockingham glove. Hair comparison identifies shared characteristics rather than unique genetic markers, so it is less definitive than DNA profiling, but it placed Simpson in contact with both items.
Fiber analysis added another layer. The knit cap and the Rockingham glove both contained carpet fibers matching the reddish-beige synthetic fibers used in 1993 and 1994 Ford Broncos. An FBI fiber expert determined the fibers had a distinctive shape and dye formulation used by the carpet manufacturer Masland, and that the specific carpet was installed in only three Ford vehicle lines during a narrow production window. The fibers could not have come from a nearly identical Bronco owned by Simpson’s friend Al Cowlings because of differences in model year and carpet type. Dark blue cotton fibers consistent with the clothing Simpson wore that evening also appeared on the Rockingham glove, the bedroom socks, and Goldman’s shirt.
Why the Evidence Didn’t Produce a Conviction
The defense did not offer an alternative suspect. It attacked the credibility of the evidence itself, and several specific openings gave those attacks real force.
Collection and Contamination
LAPD criminalist Dennis Fung, responsible for collecting much of the physical evidence at both scenes, admitted on cross-examination that he had not worn rubber gloves while handling every item. He also acknowledged missing blood drops on a fence near the bodies during his initial collection and returning weeks later to gather them. The defense argued sloppy procedures had allowed cross-contamination between samples, potentially corrupting the DNA results.
Detective Philip Vannatter drew separate scrutiny over Simpson’s reference blood sample. After Simpson voluntarily provided it, Vannatter carried the vial back to the Rockingham estate rather than booking it into evidence at the police station. He testified he wanted to deliver it directly to the criminalist working the case and said he never opened or tampered with it, but he acknowledged the vial was briefly out of his sight when he left it on his desk to get a snack before driving to Rockingham. The defense framed the detour as a fundamental breach of protocol that opened the door to planting.
The EDTA Testimony
Defense expert Fredric Rieders, a toxicologist, testified that blood stains on the bedroom socks and on the Bundy rear gate contained traces of EDTA, a chemical preservative used in the purple-topped tubes that police labs use to store drawn blood samples. If stains at the scene carried the preservative, Rieders argued, they could have come from reference samples rather than from bleeding at the scene, and the levels he measured were too high to have come from a naturally bleeding person. On cross-examination, prosecutor Marcia Clark got Rieders to concede that Simpson’s own unpreserved blood produced surprisingly similar EDTA readings, undercutting the planting inference.
Detective Mark Fuhrman
Fuhrman, who found the Rockingham glove, became the defense’s primary target for the planting theory. The argument was that he had taken the left-hand glove from Bundy and placed its mate behind Simpson’s guest house. The theory gained traction when audio recordings surfaced in which Fuhrman used racial slurs and spoke of misconduct, contradicting his sworn testimony that he had not used such language in the preceding decade. When recalled to the stand, Fuhrman invoked his Fifth Amendment right against self-incrimination rather than answer whether he had planted evidence. Polling at the time showed a majority of Americans still believed Fuhrman had found the glove where he said he did, but the recordings damaged both his credibility and the prosecution’s case.
The Glove Demonstration
Prosecutors asked Simpson to try on the leather evidence gloves in front of the jury. He appeared to struggle pulling them onto his hands, and defense attorney Johnnie Cochran produced the trial’s most-quoted line: “If it doesn’t fit, you must acquit.” The prosecution later argued the gloves had shrunk after being soaked in blood and improperly stored, and noted Simpson wore latex examination gloves underneath, adding bulk. Some observers also noted Simpson had stopped taking anti-inflammatory medication, which may have caused his hands to swell. Whatever the explanation, the image was devastating to the prosecution’s narrative.
The Same Evidence in the 1997 Civil Trial
After Simpson’s criminal acquittal in October 1995, the families of Nicole Brown Simpson and Ronald Goldman brought a wrongful death lawsuit. The civil trial applied a lower standard of proof. Criminal convictions require evidence beyond a reasonable doubt; civil liability requires only a preponderance of the evidence, meaning the plaintiff’s version is more likely true than not. In February 1997, the jury found Simpson liable for both deaths and awarded the Goldman family $8.5 million in compensatory damages.
Much of the same forensic evidence appeared, but some differences worked against Simpson. He was required to testify and sit for depositions, something he had not done in the criminal case. Freelance photographer E.J. Flammer’s 30 color negatives from a September 1993 NFL game, which Bodziak identified as showing Simpson wearing Bruno Magli Lorenzo-style shoes, were introduced for the first time, directly contradicting Simpson’s deposition claim that he had never owned such shoes. Without the criminal trial’s focus on police misconduct and Fuhrman’s credibility, the physical evidence carried more weight with the civil jury. The same body of crime scene evidence produced opposite outcomes depending on the legal standard applied and the courtroom context in which it was presented.