Michael Connelly, a bestselling author known for his crime fiction, has presented a new theory linking the notorious Zodiac Killer to the 1947 murder of Elizabeth Short, widely known as the Black Dahlia. This connection, based on years of research and collaboration with retired Los Angeles Police Department detectives Rick Jackson and Mitzi Roberts, has reignited public interest and debate over two of California’s most infamous unsolved cases.

The Black Dahlia case centers on the brutal killing of Elizabeth Short, whose mutilated body was discovered in Leimert Park, Los Angeles. At 22, Short was living a precarious and itinerant life before her death, which involved a surgical precision that suggested medical knowledge and a chilling level of violence, including what has been described as a “Glasgow smile,” cuts extended from the corners of her mouth toward the ears. Despite intense investigations, no one was ever charged in connection with her murder, and the case has remained cold for decades.

Connelly’s interest in reexamining the Black Dahlia killing intensified after being introduced last year to Alex Baber, an amateur sleuth in West Virginia who claims to have solved one of the Zodiac Killer’s encrypted ciphers. Baber’s work, which utilized artificial intelligence to decode a particularly brief Zodiac cipher known as Z13, led him to a suspect named Marvin Margolis, a World War II veteran whom Baber and Connelly now assert was responsible for both the Zodiac’s crimes and the Black Dahlia murder.

Margolis has previously been considered a suspect in the Black Dahlia case but never linked to the Zodiac killings. Connelly and his collaborators have advanced this theory through a podcast series titled “Killer in the Code,” whose second season recently premiered, detailing their investigation and evidence. Connelly has expressed strong confidence in their findings, describing the case against Margolis as “completely convincing” and indicating his willingness to stake his reputation on their conclusions.

However, this theory has drawn sharp criticism from parts of the true crime community and established experts. Larry Harnisch, a leading Black Dahlia historian, has dismissed the podcast’s assertions as flawed, accusing Connelly of relying on poor cryptography and unsubstantiated evidence. Harnisch has characterized the effort as a “scam” and questioned Connelly’s qualifications to investigate the case beyond his previous work as a journalist and novelist.

Connelly, who has a long-standing respect for detectives who persist with cold cases, has publicly shrugged off such critiques, describing detractors as an “incestuous group” resistant to abandoning their favored theories. He views their opposition as motivated by attachment to alternative suspects and their own extensive personal investments in the case.

The renewed attention on these decades-old crimes highlights the enduring fascination with unsolved mysteries that have shaped Los Angeles’s cultural memory. For Connelly, the Black Dahlia represents more than just a case—it is a symbol of lost potential and the darker side of the city’s history. Despite the controversy, he remains committed to pursuing the truth, believing that resolving these long-standing cases honors both the victims and the investigators who refuse to forget them.