I found two clippings on Ancestry.com but under the wrong name. Try Eva Martha Holmes. The first was "Woman Slain As She Prowls In S.L. Store". The second was "Grocer Freed In Death Case", which was in the Ogden Standard Examiner on Jan.31, 1935. In that article she is referred to as Eva Margaret Holmes.
Thank you for sharing your interesting story. I'm actually trying to chase down an offspring of that bootlegger, Bob Grow, the individual being born in 1921 so it doesn't seem likely that Eva was the mother.