iran must be held accountable for its actions. reporter: a short time ago, the house speaker put pressure swearly on the white house squarely on the white house, megyn, to respond to the iranian plot. i think this plot is, it s a very serious breach of international behavior. and i would hope that our administration would hold the iranian government, and hold their feet to the fire. reporter: the criminal complaint against 56-year-old manssor arbabsiar, he was arrested on september 29th, criminal complaint really reads like a b movie. there s coded language that included chevrolet for the assassination of the ambassador and a second suspect, a member of iran s quds force is believed to be hiding in iran.