CA SB938

Expands the definition of "false evidence" in habeas corpus proceedings to include expert opinions undermined by scientific research that existed at the time of testimony, not just later research or technological advances.

Adds that false evidence includes expert opinions where a reasonable dispute has emerged within the relevant scientific community regarding the validity of the methods or theories used by the expert.

Specifies that expert opinions based on circular reasoning cannot serve as reliable matter for forming opinions, defining circular reasoning as conclusions solely based on the same unproven premise the expert seeks to establish.

Clarifies that prosecutors' knowledge of false evidence is immaterial to habeas corpus petitions based on false evidence introduced at trial or guilty plea proceedings.

Protects experts from additional liability beyond existing law when their original opinions are repudiated or undermined by scientific research, technological advances, or community disputes over their methodologies.