Sensation Comics#20(1943)

Marva Psycho infiltrates a WAAC training unit and apparently attempts to assassinate the training camp's commander. Major Steve Trevor is on the scene, investigating some prior sabotage, and Lieutenant Diana Prince is assisting him. They investigate the shooting, and Lt. Prince quickly deduces that Marva is guilty. Steve finally figures out that Diana Prince has to be Wonder Woman, and snatches away her spectacles. Diana uses ventriloquism to distract Steve, jumps out the window, and returns in costume, and deceives Steve yet again into disbelieving the abundant obvious evidence of her double identity. Marva Psycho ingeniously traps Diana in her own Lasso of Truth, then puts on a black wig, and swaps outfits with Wonder Woman. Whatever she's up to, it doesn't work out, and soon she's arrested by the camp's MPs; Wonder Woman, disguised as Marva, is soon also arrested. The M.P.s compel them to swap back into their own clothes, then they tie up Marva with Diana's Lasso. Thus bound, Marva protests her innocence again, so now Diana deduces that Marva really is innocent of the earlier murder attempt. According to Marva, she had stumbled onto the saboteurs responsible for the earlier incidents that Major Trevor was now investigating. Their leader was an old associate of her estranged husband Dr. Psycho, a Nazi agent named Stoffer. Marva had tried to use a handgun to arrest Stoffer, but he easily took it away from her, then later used it to shoot General Standpat, neatly framing Marva for the crime. The Lasso also compels her to point out that "General Scott", in whose office this conversation takes place, is actually Stoffer, in disguise. Stoffer not only escapes, but head-konks both Marva (effectively) and Diana (ineffectively) unconscious, and brings them along with him, plus the real General Scott, as he escapes in an ambulance. Then Stoffer gets into an airplane and it takes off. Wonder Woman is only faking unconsciousness, and this ambulance has a bomb aboard it, she gets herself and everybody else out of the speeding ambulance, grabs it, and flings it into the path of Stoffer's getaway aircraft, destroying it. Marva is exonerated of all charges and awarded a medal.