That locker has been occupied for years now, but its neighbor recently became available, and it was the first time I saw inside it. It too has newspaper glued to the back wall.
The banner reads, "Los Angeles Examiner...A Paper for People Who Think." I guess that's why it went out of business, which it ultimately did. It was started by William Randolph Hearst in 1903, and it would be the first newspaper to break the story of the Black Dahlia in 1947. It merged with the Herald Express in 1962 and that folded in 1989.
But we still don't know why this paper was glued to the wall. Some mysteries are never solved.