Today in History: December 23, Japanese war leaders executed go.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from go.com Daily Mail and Mail on Sunday newspapers.
From his basement in upstate New York, Herbert MacDonell launched modern bloodstain-pattern analysis, persuading judge after judge of its reliability. Then he trained hundreds of others. But what if they’re getting it wrong?