I’ve long known that Foucault and his colleagues discovered the case of Pierre Rivière in Annales d’hygiène publique et de médecine légale, during the seminar of his first year of his work at the Collège de France. This particular case so fascinated them that they spent a considerable part of the second year of this seminar on the case; and the third seminar preparing its publication. The book that resulted comprised a dossier of all the reports alongside the memoir, and some contemporary essays by seminar participants. I’ve written a bit about the role of Jean-Pierre Peter in this work (and in uncovering some other cases) before.
Only today did I discover that the original piece from the Annales was available online at Criminocorpus, which has several other documents from this journal.
« Condamnation à mort d’un aliéné homicide : demande en commutation de peine, formée par le jury [affaire Pierre Rivière] » Annales d’hygiène publique et de médecine légale, 1836, série 1, n° 15, pp. 129-205.
It seems that Foucault and his colleagues used the material here, but in a different order, supplemented by other pieces they found or the complete text of some documents. Nonetheless, it’s an interesting piece in its own right, given that it’s the original impetus for the project.