An investigator working for the Orange County District Attorney’s (OCDA) office filed a lawsuit alleging District Attorney Todd Spitzer “actively sabotaged” a high-profile sexual assault case. The April 5 filing relates to a Newport Beach surgeon and his girlfriend, and claims the case was compromised due to a personal relationship Spitzer had with a defense attorney. The complaint was filed by Jennifer Kearns, a former police officer with the Long Beach Police Department who has been employed as an investigator with the OCDA’s office since 2017. Kearns was the lead investigator in the rape case against Dr. Grant Robicheaux and his girlfriend Cerissa Riley, who were accused of drugging and raping various women in 2018. “After his selection as DA, Spitzer apparently colluded with the defense while engaging in a concerted political campaign to undermine the prosecution, discredit the victims, and ultimately destroy the criminal case against the criminal defendants,” the lawsuit writes. The lawsuit also alleges …