From his signing statement ratifying the UN Convention on Torture from 1984:
"The United States participated actively and effectively in the negotiation of the Convention . It marks a significant step in the development during this century of international measures against torture and other inhuman treatment or punishment. Ratification of the Convention by the United States will clearly express United States opposition to torture, an abhorrent practice unfortunately still prevalent in the world today.
The core provisions of the Convention establish a regime for international cooperation in the criminal prosecution of torturers relying on so-called 'universal jurisdiction.' Each State Party is required either to prosecute torturers who are found in its territory or to extradite them to other countries for prosecution."
My italics. Reagan was admant about prosecuting torture, but also prosecuting inhuman treatment that some might claim was not full-on torture. Now go read National Review or The Weekly Standard. And look what has happened to conservatism in America.