Note the last panel on this page: the grinning, malevolent close up. Jodloman usually had one of these in every story during his run of work in the DC Comics mystery books. The sinister full-face panel didn't always indicate the villain, but it did mark the place in the story where the reader is supposed to start worrying about what's ahead. Jodloman's art usually had a blonde-haired heroine who bordered on helplessness before the forces of stupidity and evil, which were often combined in the stories to mean about the same thing.
House of Secrets: Jess Jodloman The Sunken Treasure of Captain Hatch
1972 Rubeny Page from House of Secrets, DC Comics
Alex Nino page from Weird War Tales, 1972, DC Comics