More than 32 years after a Navy sailor was stabbed to death outside his Point Loma rental home, cold-case investigators on Wednesday arrested a suspect who they identified through forensic genealogy, authorities said.

San Diego homicide detectives and FBI agents arrested Brian Scott Koehl, 51, in Knoxville, Tennessee on suspicion that he murdered Navy Petty Officer Larry Joe Breen in 1990, according to the San Diego County District Attorney’s Office.

Breen, who at the time was a cook stationed aboard the guided missile cruiser USS Fox, was stabbed multiple times in the neck, according to the District Attorney’s Office. A couple that was house hunting found his nude body slumped against his backyard fence in a pool of blood, according to a story from the time in The San Diego Union.

The investigation into Breen’s slaying went unsolved for more than three decades until investigators took a fresh look at the case using genetic genealogy — a method where expert forensic genealogists try to match DNA from a crime scene to relatives who have uploaded their DNA into public databases.

A hit in the publicly accessible database — a third cousin will do — helps genealogists generate family trees in hopes of putting a name to the mystery DNA from the crime scene. The investigative technique gained notoriety in 2018 when it was used to catch the Golden State Killer.

Koehl, who would have been 18 or 19 years old at the time of the slaying, is expected to…