9 Cal.4th 275 (Cal. 1994) Cited 365 times 2 Legal Analyses
Holding that where the requisite substantial relationship exists, "access to confidential information by the attorney in the course of the first representation (relevant, by definition, to the second representation) is presumed and disqualification of the attorney's representation of the second client is mandatory; indeed, the disqualification extends vicariously to the entire firm"