Marvel Mystery Comics #49

The Kangaroo Man uses a boomerang coated with a chemical that transforms blood into gasoline to kill his brother. His brother refused to finance his research on ethical grounds, and when the Japanese agreed to help, they demanded the Kangaroo Man silence his brother. Since Torch and Toro have captured him, he confesses everything and says he really didn't want the Japanese to get his formula. As he has previously injected himself with his chemical, he lights his final cigarette and bursts into flames.