On May 23, 1982, 13-year-old Sarah Geer was raped and strangled to death in an alley off a residential street in the Cloverdale area of Sonoma County, California. Her body was discovered the following day by a firefighter. For over four decades, the case remained unsolved.

On February 13, 2026—what would have been Geer's 57th birthday—a jury found James Oliver Unick guilty of her murder with special circumstances of sexual assault. The conviction marked the culmination of an investigation that lay dormant for nearly two decades before modern forensic technology and renewed determination finally identified her killer.

When Geer was found, investigators collected biological evidence from the crime scene, including DNA from sperm found on her underwear and clothing. However, in 1982, DNA technology was not yet available for criminal investigations. The case grew cold as leads dried up and years passed without answers for Geer's family.

In 2003, two decades after the murder, the California Department of Justice developed a DNA profile from the crime scene evidence. Yet when this profile was entered into law enforcement databases, it yielded no matches. The case remained stalled until 2021, when the Cloverdale Police Department took a decisive step: they hired private investigator Kevin Cline to revisit the cold case.

Cline's efforts led to a breakthrough. The FBI became involved and employed familial DNA databases—a technique that identifies potential suspects by matching DNA to relatives in existing databases. This strategy narrowed the suspects to one of four brothers. Among them was James Oliver Unick.

To confirm their suspicions, FBI agents conducted surveillance of Unick. During this surveillance, they collected DNA from a discarded cigarette butt he had smoked. When the laboratory compared this DNA to the 2003 profile and to biological evidence recovered from Geer's clothing, the results were conclusive: it matched.

Unick was arrested on July 22, 2024, at his home, initially charged with murder, kidnapping, rape, and lewd and lascivious acts with a minor under 14 by force. At the time of his arrest, the 64-year-old denied knowing Geer and claimed to have no recollection of May 23, 1982.

At trial, the prosecution presented the DNA evidence linking Unick to the crime scene. A jury deliberated for just two hours before returning a guilty verdict, rejecting what the prosecutor described as Unick's "fictitious account" of his whereabouts and knowledge. The quick deliberation underscored the strength of the forensic evidence against him.

Unick was convicted of murder with the special circumstance of sexual assault committed during the crime—a charge that carries significant legal weight in California. As of February 2026, he was sentenced to life in prison without the possibility of parole.

The conviction demonstrates how advances in DNA technology and familial search databases have transformed the investigation of decades-old crimes. Cases once considered cold and unsolvable can now be revisited with scientific tools unavailable to investigators at the time of the original crime. For Sarah Geer's family, the conviction provides a measure of justice and closure after 44 years of waiting.

**Sources**

https://truecrimenews.com/2026/02/18/cold-case-of-teen-assaulted-and-killed-in-1982-is-solved-thanks-to-dna-on-discarded-cigarette/

https://abcnews.com/US/cold-case-murder-teen-solved-44-years-dna/story?id=130306985