This series, which comprises half the collection, consists of correspondence and legal papers relating to Marmor's role as an expert witness on behalf of gay plaintiffs in several legal cases. The most prominent cases are Baker v. Wade (1980-1984), a challenge to Section 21.06 of the Texas Penal Code, which prohibited sodomy and oral sex between people of the same sex, and Evans v. Romer (1993), a challenge to Amendment 2 to the Colorado State Constitution, enacted in 1992, that prohibited state and local governments from enacting any law, regulation, or policy that would, in effect, protect the civil rights of gays, lesbians, and bisexuals. Marmor appeared as an expert witness for the plaintiff in both cases, in the first to refute the testimony of Paul Cameron, and in the second, of Charles W. Socarides and Harold M. Voth. The papers include Marmor's correspondence with plaintiffs' counsel, affidavits and transcripts of testimony of defendants' expert witnesses (often with Marmor's notes), and transcripts of Marmor's own testimony and detailed affidavits.