The government’s forensics investigator stood up to an aggressive cross-examination from the defense Wednesday during his fourth day on the stand in the computer sabotage trial of a former systems administrator. Keith Jones, director of computer forensics and incident response at Mandiant, an information security company based in Alexandria, Va., withstood an hour and a half of often contentious questioning from Chris Adams, the lead defense attorney for Roger Duronio, who is being tried on federal charges for allegedly building and planting malicious code that took down the main host server, along with about 2,000 branch servers, at UBS PaineWebber four years ago…
