“The Committee is grateful to citizens who come forward with relevant information in good faith, even if they are not one hundred percent sure about what they know. But when individuals provide fabricated allegations to the Committee, diverting Committee resources during time-sensitive investigations, it materially impedes our work. Such acts are not only unfair; they are potentially illegal. It is illegal to make materially false, fictitious, or fraudulent statements to Congressional investigators. It is illegal to obstruct Committee investigations,” Grassley said in the letter.