While speaking to Perry outside the courthouse, the back of Brian Keith's bald head could be seen underneath his hat, but when he testified in the courtroom, he had a full head of hair.
Ken Malansky could not have been Polish The rule of Polish surnames is that y can never follow k at the end It may end in ski for familial and male gender or ska for female gender.
At approx. 57 minutes (depending on commercials), Perry is speaking with his "old friend" Frank Wellman Sr (Brian Keith), Wellman says "Well, I'm not going to stand by while you FRAG my boy through the mud." Should be DRAG.
The night skyline shown in this movie and other modern Perry Mason movies is of Atlanta with the Peachtree Plaza not of Denver where the movie is supposedly taking place.