Conflict of interest

California State Bar Formal Opinion No. 1980-52 It is improper for counsel in a criminal case to represent a defendant where a previous client of that attorney's office is a witness against the new client and it is reasonably foreseeable that the confidences or secrets of the former client may be, or may reasonably appear to the client to be, used. http://www.calbar.ca.gov/Portals/0/documents/ethics/Opinions/1980-52.htm People v. Lopez (2008) 168 Cal.App.4th 801, 808.

California State Bar Fomral Opinion No. 1981-59 "It is improper for counsel to continue representing either defendant charged in two separate, unrelated criminal cases once counsel becomes aware that one of these defendants is attempting to become, or has become, an undercover informant against the other defendant." http://www.calbar.ca.gov/Portals/0/documents/ethics/Opinions/1981-59.htm

Conflict of prosecutor

United States v. Navarro (E.D. Cal. 1997) 959 F.Supp. 1273. continued appointment of deputy district attorney as Special Assistant United States Attorney beyond statutory four-year limit on appointment of local government employees to federal agency for work of mutual concern was jurisdictional defect.

Rupley v. Winkler (1956) 147 Cal.App.2d 168

People v. Pumar (2023) 95 Cal.App.5th 504

People v. Lastra (2022) 83 Cal.App.5th 816

Packer v. Superior Court (2014) 60 Cal.4th 695

People v. Trinh (2014) 59 Cal.4th 216

Spaccia v. Superior Court (2012) 209 Cal.App.4th 93

Polanski v. Superior Court (2009) 180 Cal.App.4th 507

People v. Cannedy (2009) 176 Cal.App.4th 1474

Hollywood v. Superior Court (2008) 43 Cal.4th 721

Haraguchi v. Superior Court (2008) 43 Cal.4th 706

People v. Parmar (2001) 86 Cal.App.4th 781

People v. Clark (1993) 5 Cal.4th 950, disapproved by People v. Doolin (2009) 45 Cal.4th 390

People v. Municipal Court (1978) 77 Cal.App.3d 294

People v. Alocer (1991) 230 Cal.App.3d 406