I think Rober's most striking role amongst his noir credits is found in Siodmak's THE FILE ON THELMA JORDON, where he plays Barbara Stanwyck's abusive boyfriend. IIRC, his fate in that film is ironically similar to what happened to him in real life (though the authorities never suggested that the female passenger in his automobile instigated things the way Stanwyck does: their speculation was that he missed a curve in a steep, windy section of Topanga Canyon Road while driving in foggy conditions...and took his car down a 75-foot embankment).