A 45-year-old cold case of a 17-year-old girl brutally raped and murdered has been resolved, bringing closure to the family. On February 9, 1979, Esther Gonzalez walked from her parents’ home to her sister’s in Banning, California, roughly 137 km east of Los Angeles. She never arrived. The next day, her body was discovered in a snowpack near a highway in Riverside County, California. Authorities determined she had been raped and bludgeoned to death, leading to an investigation that spanned decades.

The lab was able to match the DNA to a man named Lewis Randolph “Randy” Williamson, who died in 2014. Williamson, a US Marine Corps veteran, called authorities on the fateful day to report finding Ms Gonzalez’s body. At the time, he claimed he could not identify whether the body was male or female. Described as “argumentative” by deputies, Williamson was asked to take a polygraph test, which he passed, clearing him of suspicion in the pre-DNA era. He had faced assault allegations in the past but was never convicted of any violent crimes, according to the Los Angeles Times.

Despite limited leads, the Riverside County cold case homicide team didn’t give up. A semen sample recovered from Ms Gonzalez’s body in 1979 was preserved but remained unmatched in the national Combined DNA Index System (CODIS) for decades.

In 2023, forensic technology finally caught up. The homicide team collaborated with a genetic lab in Texas that specialises in forensic genealogy. A sample of Williamson’s blood from his 2014 autopsy provided the DNA match needed to confirm him as the 17-year-old’s rapist and killer.

The Gonzalez family had mixed emotions—relief at finally having answers and sadness knowing Williamson would not face justice, as he died in Florida ten years ago. Ms Gonzalez, remembered by her family as a shy yet funny and mild-mannered young woman, was the fourth of seven children. Her oldest brother, Eddie Gonzalez, wrote on Facebook, “The Gonzalez family would like to thank the Riverside County Sheriff’s Department on a job well done. After 40 years, the Gonzalez family has closure.”

“We are very happy that we finally have closure,” Ms Gonzalez’s sister, Elizabeth, 64, shared with CNN. “We are happy about it but, since the guy has died, a little sad that he won’t spend any time for her murder.”