Quadra v. Superior Court involves a challenge to the procedures used in the selection of San Francisco's investigative grand jury. The Hastings Law Journal has reprinted plaintiffs' memoranda, which argue that such procedures should be governed by the standards applicable to indicting grand juries.
Jon Van Dyke and Sidney M. Wolinsky,
Quadra v. Superior Court of the City and County of San Francisco: A Challenge to the Composition of the San Francisco Grand Jury,
27 Hastings L.J. 565
Available at: https://repository.uchastings.edu/hastings_law_journal/vol27/iss3/2