Sam Little, the convicted murderer who earlier this year claimed he had killed at least 90 women across the U.S., has confessed to slayings in at least 37 cities stretching back decades, including more than a dozen in Southern California, according to an FBI timeline made public Tuesday.

Little, 78, had been a target of law enforcement for decades after he was linked to the strangulation deaths of prostitutes in Mississippi and Florida in the 1980s, but he eluded conviction.