WCCO (AM), a CBS affiliate--the network where the program originated. This local affiliate intended to use the photo in its local ads for the Minneapolis-St. Paul area it serves.
The photo has no copyright markings on it as can be seen in the original upload.
Label fragment visible in original upload indicates the Suspense episode being promoted was the March 8, 1945, presentation titled "Love's Lovely Counterfeit". From J. David Goldin's RadioGOLDINdexarchive copy at the Wayback Machine: 5609. Suspense. March 8, 1945. CBS net. "Love's Lovely Counterfeit". Sponsored by: Roma Wines. A Bogie-type gangster role and a very well-done story about a double-crosser in love with a "missionary." The story was subsequently produced on "Suspense" on January 17, 1948 (see cat. #24149). Humphrey Bogart, Lurene Tuttle, Elliott Lewis, Wally Maher, John McIntire, Joseph Kearns ("The Man In Black"), James M. Cain (author), Robert L. Richards (adaptor), William Spier (producer, director), Truman Bradley (commercial spokesman), Elsa Maxwell (commercial spokeswoman), Lucien Moraweck (composer), Lud Gluskin (conductor). 1/2 hour. Audio condition: Excellent. Complete.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.