(NewsNation) — An author insists her conclusion about the identity of Jack the Ripper is more reliable than a new DNA-based theory pointing to another suspect.

Historian Russell Edwards recently made waves by suggesting London’s notorious serial killer was a Polish barber named Aaron Kosminski. He based that claim on mitochondrial DNA pulled from a shawl that purportedly was recovered at the murder scene of victim Catherine Eddowes.

On Monday, Sarah Bax Horton reiterated her own belief that the murderer was actually cigar maker Hyam Hyams, who was institutionalized for mental illness, after which the highly publicized killings stopped.

Horton’s 2024 book, “One-Armed Jack,” leans into old-fashioned detective work, rather than genetic evidence. She says Hyams had a disability from a broken elbow and a shuffling gait that corresponded with eyewitness descriptions of Jack the Ripper.

“For the first time in history, Jack the Ripper can be identified as Hyam Hyams, using distinctive physical characteristics,” Horton told “Banfield.”

Horton is a descendant of one of the police officers who investigated the murders. Edwards, the DNA proponent, has urged officials to reopen the case. Horton said she would welcome a professional review of her work.