The Mystery of Lyle and Louise

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The Mystery of Lyle and Louise A lab on Forensic Entomology Frey

Students will….. Examine six life stages from two species of fly. Develop a dichotomous key that will separate maggots into life stages and species Use key to identify maggots collected from bodies of two victims Finally students will use know insect life-cycle information and Nation Weather Service data to estimate a time of death for each victim

On Trial…. Once lab results have been analyzed, students may conduct a mock trial to synthesize information from the investigation

Materials Species A Life Stages (3 sets of 6) Species B Life Stages (3 sets of 6) Evidence Collections (6 vials) Weather Service Data (6 Sheets) Forceps Dissection microscopes or hand lenses Pre and post lab questions

Lab Procedure- 3 parts Part 1 Students familiarize themselves with the morphology of each life stage of two species of fly. Identify key characteristics and develop a system tot separate the two species and six life stages Use ABSOLUTE characters so that identifying can be made with out needing comparison

Part 2 Students use the system (or taxonomic key) they developed to identify samples of flies collected from the two bodies Aggregate data so everyone has a complete set

Part 3 Analyze data collected and determine and approximate time of death

History of Forensic Entomology Have discussion before lab “There is considerable need for forensic entomologists to engage in such growth a development studies, both in the laboratory and field. As this research is performed and results are published, forensic entomology is becoming an increasingly useful tool in a crime scene investigation

Achieve an advanced degree (either M. S or Ph. D Achieve an advanced degree (either M.S or Ph.D.) in entomology, ecology biology or zoology Become certified by the American Board of Forensic Entomology by completing a minimum of 3 years of professional experience in casework, publishing at least one scholarly paper and giving on professional presentation in the field of forensic enotomogy.