Rippercast brings you Prof. Charles Tumosa's presentation from Rippercon-Baltimore entitled 'The Forensic Time Machine-Looking Backwards'. Tumosa discusses modern day forensic document examination and how those techniques could (or could not) be applied to such items as the letters from 'Jack the Ripper' and the Maybrick Diary. He also touches on Patricia Cornwell's work on her preferred suspect, the artist Walter Sickert, during the Q&A portion of his talk.