 Robert Eringer worked for the FBI in keeping surveillance on the activist accused of murdering whom?
Robert Eringer:  Eringer describes his assignments for the FBI, which also included keeping tabs on Ira Einhorn, in his book "Ruse: Undercover with FBI Counterintelligence" (2008). Ira Einhorn: Ira Samuel Einhorn (born May 15, 1940), known as "the Unicorn Killer", is an American environmental activist convicted of murdering his ex-girlfriend Holly Maddux.
Holly Maddux