ThisLectureNotesinComputerScience(LNCS)volumecontainsthepapersp- sentedatthe ThirdInternationalWorkshoponComputationalForensics(IWCF 2009), held August 13-14, 2009 at The Netherlands Forensic Institute in The Hague, The Netherlands. Computational forensics is a research domain focusing on the investigation of forensic problems using computational methods. Its primary goal is the d- covery and advancement of forensic knowledge involving modeling, computer simulation, and computer-based analysis and recognition in studying and so- ing forensic problems. The Computational Forensics Workshop...