The Mystery of Lyle and Louise: Questioned Documents
Determine Whether Fact or ForgeryDuring the investigation of the Mondelo murder, police have turned their suspicion on business partner John Wayne Gretsky, after finding questionable receipts on his desk. Your students must determine if these receipts are legitimate business documents or evidence of a crime. To do this, students must determine objective criteria for hand writing analysis, and then apply these criteria when examining suspect receipts.
• Grade Level 10-College• Links to a real world scenario
After analyzing the handwriting, students will dissolve the ink from numbers on the suspect invoices. Then, using thin layer chromatography, they will create an ink profile for each of the samples taken from the reciept. From this information, students will determine if the same ink was used to fill out the entire form. Finally, by combining where different inks were used with what reciepts are suspected of forgery, students can develop a complete theory of the suspected forgery.
Supplies are included for up to 30 students working in six groups. As in all Lyle and Louise modules, this kit is geared to high school and undergraduate courses, and is matched to National Science Education Standards.
Solvent w/ droppers
Suspicious receipts w/ copies
Web access to fully illustrated teacher’s manual with technique background.