1. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Warm-Up September 12, 2014 What is the difference between cause of death, manner of death, and mechanism of death?

2. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Objective SWBAT describe the role of a forensic entomologist.

3. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Agenda 1.Unit 1 Exam Tracking 2.Real CSI Video 3.Introduction to Entomology 4.Uses of Forensic Entomology 5.Life Cycle of Fly 6.PMI/Time of Death 7.Forensic Files Friday 8.Exit Slip

4. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Unit 1 Exam Tracking Objective: History, Crime Labs & Laws –Total = 25 points –4,5-10, 12, 13-15, 17, 18-25 Objective: Crime Scene & Evidence –Total = 10 points –1-3, 11, 16 Objective: Documentaries –Total = 6 points –26-27

5. Real CSI Video 4. Who determines the manner of death? 5. What is the first thing that is done when a medical examiner views a dead body, before the autopsy begins? 6. What percentage of cases do they know the cause of death once the autopsy is completed? 7. What are two reasons that the cause of death can be very hard to determine? 8. What is considered blunt trauma? 9. What is considered sharp trauma?

6. What do they do? Forensic entomologists apply their knowledge of entomology to provide information for criminal investigations. A forensic entomologist’s job may include: Identification of insects at various stages of their life cycle, such as eggs, larva, and adults. Collection and preservation of insects as evidence. Determining an estimate for the postmortem interval or PMI (the time between death and the discovery of the body) using factors such as insect evidence, weather conditions, location and condition of the body, etc. Testifying in court to explain insect-related evidence found at a crime scene. Did you know? Maggots can be used to test a corpse for the presence of poisons or drugs. Some drugs can speed up or slow down the insect’s development. Cool Jobs: Forensic Entomology Discovery Video

7. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Forensic Entomology

8. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Insects are the most diverse and abundant forms of life on earth. There are over a million described species (that’s more than a third of all known organisms). Estimates predict that if the biomass (mass of biological tissue) of all humans and all insects were measured, insects would outweigh humans more than 30 to 1. Entomology – the study of insects

9. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Insects undergo either incomplete or complete metamorphosis (Egg to larva to pupa to insect) Larva have a soft tubular body and look like worms. Fly species larvae are called “maggots” Entomology – the study of insects

10. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Forensic Entomology is the use of the insects and other arthropods that feed on decaying remains to aid legal investigations. These investigations fall into one of three categories: 1.Medicolegal (criminal) 2.Urban (criminal and civil) 3.Stored Product Pests (civil) Forensic Entomology

11. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Often focuses on violent crimes, such as: Determination of the time or site of human death Cases involving possible sudden death Traffic accidents with no immediately obvious cause Possible criminal misuse of insects Forensic Entomology - Medicolegal

12. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Urban forensic entomology deals with pest infestations where there may be litigation, such as building owners and exterminators or landlords and tenants. Forensic Entomology - Urban

13. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Several dozen insect species infest common household products of animal origin. These are known as Stored Product Pests Forensic Entomology – SPP

14. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Uses of Forensic Entomology Using insects as evidence of where a car has traveled. http://www.smithsonianchannel.com/site/sn/ show.do?episode=141561 Using maggots to estimate time of death http://www.smithsonianchannel.com/site/sn/ show.do?episode=141561#measuring-time- with-maggots

15. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Forensic Entomologist A forensic entomologist: Identifies the immature insects Determines the size and development of the insects Calculates the growth of the insects and passage through stages of the life cycle in laboratory Compares the growth against weather conditions to estimate time of oviposition (egg laying)

16. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Breeding grounds Estimates of postmortem intervals can be made from insects inhabiting remains. The estimates are based on: The time required for a given species to reach a particular stage of development. Comparisons of all insect species present on the remains at the time of examination. Ecological succession occurs as an unexploited habitat (like a corpse) is invaded by a series of different organisms.

17. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Invertabrate habitat Necrophages - the first species feeding on corpse tissue. Includes rue flies (Diptera) and beetles (Coleoptera). Omnivores - species such as ants, wasps, and some beetles that feed on both the corpse and associated maggots. Large populations of omnivores may slow the rate of a corpse’s decomposition by reducing populations of necrophagous species. Parasites and Predators - beetles, true flies and wasps that parasitize immature flies. Incidentals – pill bugs, spiders, mites, centipedes that use the corpse as an extension of their normal habitat

18. Forensic Files Friday Be sure to fill out the questions using your Forensic Files question template.

19. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Homework Entomology Pre-Lab Questions due Monday UNIT 2 EXAM ON WEDNESDAY

20. Copyright © 2013 Crosscutting Concepts, LLC. All Rights Reserved. www.CrosscuttingConcepts.com Exit Slip September 12, 2014 1. Get out a mobile device or use one of the computers and go to m.socrative.com. You can also use one of the iPads that has the Socrative app. 2. When prompted, enter 417101 for the room number. QUESTION: What is one of the main roles of an entomologist?