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

People v. AWI Builders Inc. (2022) 80 Cal.App.5th 248

Schumb v. Superior Court (2021) 64 Cal.App.5th 973

People v. Bell (2019) 7 Cal.5th 70

People v. Pierce (2019) 38 Cal.App.5th 321

People v. Dekraai (2016) 5 Cal.App.5th 1110

People v. Bryant, Smith, and Wheeler (2014) 60 Cal.4th 335

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

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

People v. Sy (2014) 223 Cal.App.4th 44

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

People v. Gamache (2010) 48 Cal.4th 347

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

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

People v. Dehle (2008) 166 Cal.App.4th 1380

People v. Superior Court (Humberto S.) (2008) 43 Cal.4th 737

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

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

People v. Vasquez (2006) 39 Cal.4th 47

People v. Jenan (2006) 140 Cal.App.4th 782

People v. Petrisca (2006) 138 Cal.App.4th 189

Hambarian v. Superior Court (2002) 27 Cal.4th 826

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

People v. Choi (2000) 80 Cal.App.4th 476

People v. Neely (1999) 70 Cal.App.4th 767

Millsap v. Superior Court (1999) 70 Cal.App.4th 196

People v. Millwee (1998) 18 Cal.4th 96

Lewis v. Superior Court (1997) 53 Cal.App.4th 1277

People v. Eubanks (1996) 14 Cal.4th 580

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

People v. Zapien (1993) 4 Cal.4th 929

People v. Merritt (1993) 19 Cal.App.5th 1573

People v. Breaux (1991) 1 Cal.4th

People v. Hernandez (1991) 235 Cal.App.4th 674

People v. Lepe (1985) 164 Cal.App.3d 685

People ex rel. Clancy v. Superior Court (1985) 39 Cal.3d 740

People v. Lopez (1984) 155 Cal.App.3d 813

Love v. Superior Court (1980) 111 Cal.App.3d 367

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

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

Media

People v. Phillips (1985) 169 Cal.App.3d 362

Prosecutor as witness

People v. Hernandez (2003) 30 Cal.4th 835

People v. Donaldson (2001) 93 Cal.App.4th 916