What is the first Neo-Noir?
I've read a lot over the years how the last true film noir is Touch of Evil ('58) or Odds Against Tomorrow ('59), and I remember Big Eddie giving a convincing argument for the swan song being Psycho ('60). I know the term itself was coined retrospectively after the movement ended, but if these movies are the cut off for the golden age- what is considered the first true Neo-Noir? Is the only thing that separates noir from neo-noir the end of the decade, or is there an change of production, style, distribution or something else that was added or taken away that separates the hard boiled movies before and after 1960?
I used to think maybe Blast of Silence ('61) was the first neo-noir, in that I felt it had a very different approach to the style of filmmaking as the 50s noirs, but then I just watched Murder by Contract ('58) for the first time, and it felt so similar in style and tone that I wouldn't call one a different genre from the other.
Obviously, this question is rather obscure since noir doesn't have a hard-and-fast definition, so why would its sub-genre, but wondering what people's thoughts are.