Michael Wacks, an FBI Special Agent, testified for the defense on September 19, 1995, called by Johnnie Cochran to deliver testimony that contradicted Detective Vannatter's account. His testimony helped establish that Detective Vannatter's sworn claim — that Simpson was not a suspect when detectives first arrived at Rockingham — was contradicted by other evidence, working in concert with testimony from mob informants Larry and Craig Fiato to impeach Vannatter's account. Judge Ito allowed this impeachment testimony even after denying the defense's broader "code of silence" theory.