"The Rigged Wheel"
Major Thorpe (writer and artist), Mort Leav (pencils and inks)
Published in Jumbo Comics #140, Oct 1950 - 6 pages
ZX-5 is asked in anonymous phone call to head to El Morista in Mexico to help investigate a case where custom inspectors are being blackmailed into allowing smuggling to take place. He discovers a scam of free trips to a resort where a rigged roulette wheel is used.