I read the entire article and didn’t notice what the ‘new evidence’ might be. Oh well.........
There was an episode years ago of “Unsolved Mysteries” that suggested that a serial killer operating in Cleveland was scared out of town by Eliot Ness and wound up in California, where he continued to kill, was the murderer of the Black Dahlia.
https://search.brave.com/search?q=eliot+ness+serial+killer