Sherlock Holmes is on the trail of a professor of logic who has become obsessed with finding out how to commit the perfect murder. Original Air Date: November 7, 1948 Take our listener survey: http://survey.greatdetectives.net Become one of our friends on Facebook... http://www.facebook.com/radiodetectives Call 208-991-4783 to leave a voicemail. Click here to download, click here to…