Representatives of the plaintiffs released a report questioning the credibility of a man who last year gave Chevron secretly recorded videos that the oil company says show judicial misconduct in the trial. According to the plaintiffs' report, the man, Diego Borja, told a friend he had evidence that would damage Chevron in the trial, evidence he would make public if the oil company mistreated him. Unbeknownst to Borja, his friend recorded their conversations and turned over the recordings to the plaintiffs...The recordings...include Borja bragging that Chevron had agreed to make him its "business partner" in return for his videos...On Monday, San Ramon's Chevron accused the plaintiffs' lawyers of submitting falsified oil field contamination reports to the court...