Ninth Circuit case:

• ECF No. 30 Amicus Brief opposing Arpaio’s request for rehearing en banc (filed June 22, 2018 on behalf of The Protect Democracy Project, Inc.; Free Speech for People; Coalition to Preserve, Protect and Defend; and Roderick and Solange MacArthur Justice
• ECF No. 64 Amicus Brief regarding Special Counsel and Affirmance (filed April 29, 2019 on behalf of The Protect Democracy Project, Inc.; Laurence H. Tribe; Martin H. Redish; Lawrence Friedman; William D. Rich; Citizens for Responsibility and Ethics in Washington; Coalition to Preserve, Protect and Defend; Free Speech for People; MoveOn; Roderick and Solange MacArthur Justice Center; and Republicans for the Rule of Law)
• ECF No. 65 Amicus Brief by certain members of Congress in support of neither party (filed April 29, 2019)

U.S. District Court case:

• ECF No. 228 Amicus Brief by Protect Democracy on the constitutionality of the pardon (filed in the U.S. District Court of Arizona on September 11, 2017)
• ECF No. 231 Supplemental Amicus Brief in support of appointing a private attorney to prosecute Arpaio’s criminal contempt (filed in the U.S. District Court of Arizona on September 11, 2017 on behalf of The Protect Democracy Project, Inc.; Martin Redish; Free Speech for People; Coalition to Preserve, Protect and Defend; and Roderick and Solange MacArthur Justice Center)