State Of Washington, V. Patrick Leon Nicholas

Court of Appeals of Washington·Decided May 5, 2025·No. 85387-2·Unpublished

Opinion

IN THE COURT OF APPEALS OF THE STATE OF WASHINGTON

STATE OF WASHINGTON, No. 85387-2-I

Respondent,

DIVISION ONE

v.

UNPUBLISHED OPINION

PATRICK LEON NICHOLAS,

Appellant.

MANN, J. — Patrick Nicholas was convicted of murder in the first degree with sexual motivation based on his 1991 murder of 16-year-old Sarah Yarborough. Nicholas appeals his conviction arguing the State’s DNA statistical evidence was inadmissible under Frye,1 and that it was unconstitutional for police officers to obtain his DNA from a discarded cigarette butt. Nicholas also argues that his exceptional sentence is invalid. We remand for resentencing on the exceptional sentence. We otherwise affirm.

I

On December 14, 1991, Sarah Yarborough, a 16-year-old student at Federal Way High School (FWHS), planned to join her drill team for a competition. She arrived at FWHS approximately 45 minutes prior to the meeting time.

1 Frye v. United States, 54 App. D.C. 46, 293 F. 1013, 1014 (1923).

Around 9:20 a.m., two 12-year-old boys were walking through FWHS grounds when they noticed a white male emerge from the hillside next to the parking lot. The boys noticed the man was wearing a long, dark trench coat; they locked eyes with him as the man began quickly walking away. The boys approached the area where the man emerged from and discovered a body of girl in a drill team uniform lying motionless on her back. The boys ran home and told their parents who then called the police.

Police officers arrived and found Yarborough lying in her drill team uniform. Her nylon stockings were wrapped around her neck in a ligature. Yarborough’s underwear, bra, jacket, and socks were in a pile about three feet away from her body.

An autopsy revealed that Yarborough died as a result of ligature strangulation and blunt force injuries to her face. Semen was found on the items of clothing placed away from Yarborough’s body. Washington crime lab DNA scientists developed a single male DNA profile from the semen on Yarborough’s clothes.

For over 27 years, and despite over 4,000 tips, there was never a match to the male DNA profile found at the scene. Then, on September 27, 2019, detectives received a phone call from Dr. Colleen Fitzpatrick, a forensic genealogist. Fitzpatrick used the unknown DNA profile from the crime scene and genealogy comparisons to find a person of interest. She gave the detectives the names of two brothers with the last name Nicholas. One brother was already in the combined DNA index system (CODIS) from a prior conviction of rape in the first degree, so detectives immediately ruled him out as a potential killer. But Patrick Leon Nicholas was not in CODIS despite two prior convictions for rape in the first degree and one conviction for attempted rape in the first degree.

On September 29, 2019, detectives began undercover surveillance of Nicholas.

Detectives observed Nicholas smoke two cigarettes outside a laundromat and then discard the cigarette butts on the ground. Detectives retrieved the cigarette butts and a napkin that fell out of Nicholas’s pocket.

On October 2, 2019, it was confirmed that the unknown DNA left on Yarborough’s clothes was a match to the DNA on Nicholas’s discarded cigarette butts and napkin. Police arrested Nicholas on October 3, 2019.

Nicholas was charged with premediated murder in the first degree (count 1), felony murder in the first degree predicated on attempted rape in the second degree (count 2), and felony murder in the second degree predicated on indecent liberties (count 3). All counts included allegations of sexual motivation.

Nicholas moved to suppress evidence gathered through the search of Nicholas’s family tree and the collection and testing of the discarded cigarette butts. Nicholas asserted that genetic information is a private affair and thus protected by article I, section 7. Accordingly, Nicholas argued that the seizure and testing of his cigarette butt was an improper warrantless search.

The trial court concluded that Nicholas lost any privacy interest and relinquished his DNA when he voluntarily abandoned his cigarette butt outside the laundromat. The court concluded that no subsequent search warrant was needed to test and to compare the DNA from the abandoned items to the DNA from the crime scene.

Nicholas also requested a Frye hearing to determine the admissibility of statistical calculations the Washington State Patrol Crime Lab (WSPCL) developed to explain the significance of the DNA match. After hearing testimony from experts for

both sides, the trial court concluded that the State’s calculations for the significance of a scientific match was widely regarded in the relevant scientific forensic community as the appropriate scientific calculation.

A jury found Nicholas guilty of murder in the first degree and murder in the second degree. The jury acquitted Nicholas of the crime of murder in the first degree premediated.2 The trial court imposed an exceptional sentence of 548 months on count two based on the jury’s special verdict finding that the crime was sexually motivated.

Nicholas appeals.

II

Nicholas argues that the trial court erred in admitting the State’s calculation of the significance of a DNA match in this case because it was inadmissible under Frye. We disagree.

A

DNA is commonly referred to as our genetic blueprint that is passed down from parents to children. Forensic DNA testing assumes that while humans share 99 percent of the same DNA, there are specific locations on the human genome that vary significantly among individuals, which can be tested to find potential matches.

After a profile has been identified as a possible source of DNA, the calculation must be accompanied by a statistic that explains the strength of the match. There are different types of calculations that can be used, including Random Match Probability

2 The trial court vacated the conviction for murder in the second degree based on double jeopardy.

(RMP). The RMP is the probability that an unrelated person randomly chosen from the population is included as a potential contributor of the mixed DNA profile.

Here, WSPCL’s forensic scientist, Jennifer Venditto, reported statistical calculations using the RMP method. Venditto determined the DNA obtained from the crime scene matched Nicholas and the probability an unrelated individual at random from the U.S. who had a matching profile was 1 in 120 quadrillion.

Nicholas requested a Frye hearing arguing the State’s statistical calculation was not generally accepted in the scientific community when the suspect is initially identified through a database search. He did not dispute that the RMP is a generally accepted method, but he argued that the RMP needs to be adjusted if a suspect is first identified through a database.

At the Frye hearing, Dr. Daniel Krane testified for the defense. He is a biology professor at Wright State University and an owner of a consulting business that assists individuals, typically defendants, “who want to have better understanding about issues pertaining to forensic DNA profiling.” Dr. Krane testified that the RMP statistic needs to be adjusted to reflect that a database was initially used to identify Nicholas. He testified that an adjustment is necessary in these situations to address “ascertainment bias,” explaining:

But the way that an individual is identified as a suspect can have a very dramatic impact on how impressed we should be that we subsequently find that their DNA profile matches.

....

There are a number of analogies that might be of help. The—the issue here is ascertainment bias. The difference between a probable cause type of DNA profile case, typical, and a cold hit case is how it is that a suspect was identified. In statistical parlance, that can be described as

ascertainment bias. How somebody was ascertained. For a probable cause case, there is no ascertainment bias. For a cold hit case, there is ascertainment bias.

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State Of Washington, V. Patrick Leon Nicholas, (Wash. Ct. App. 2025).

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