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Forensic Entomology Part I

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Forensically, the focus is usually on the days-years time ... class - Arachnida (spiders, scorpions) class - Chilopoda (centipedes) class Insecta (insects) ... – PowerPoint PPT presentation

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Title: Forensic Entomology Part I


1
Forensic Entomology (Part I)
Jason Linville University of Alabama at
Birmingham jglinvil_at_uab.edu
2
Taphonomy
  • Definition
  • The study of the conditions and processes by
    which organisms become fossilized.

Forensically, the focus is usually on the
days-years time frame rather than processes that
occur over thousands of years.
3
Forensic Taphonomy
  • Reconstruct the circumstances of death
  • Estimate the time of death

4
Forensic Taphonomy
  • Forensic Anthropology
  • Usually deal with skeletonized bodies
  • Approximately 6 months for surface burial

Can Interpret
  • General weathering of the bone
  • Damage by carnivore scavengers
  • Trace Elements

5
Forensic Taphonomy
  • Forensic Anthropology

Any time since death estimation is just an
estimation. It can be very difficult when
dealing with skeletonized remains.
6
Forensic Entomology
7
Forensic Entomology
  • Forensic Entomology Background
  • Estimating the Postmortem Interval (PMI)
  • DNA Analysis of Maggot Crop Contents

8
Forensic Entomology
  • Forensic Entomology

Study of insects and their arthropod counterparts
that interact with legal matters.
Urban Entomology
Stored Product Entomology
Medicolegal Entomology
9
Forensic Entomology
  • Forensic Entomology

Study of insects and their arthropod counterparts
that interact with legal matters.
Urban Entomology
Stored Product Entomology
Medicocriminal Entomology
10
Forensic Entomology
  • Forensic Entomology

Study of insects and their arthropod counterparts
that interact with legal matters.
Urban Entomology
Stored Product Entomology
Forensic Medical Entomology
11
Forensic Entomology
  • Insects and other arthropods can be used to
    answer

How or where a death occurred.
When did death occur?
Postmortem Interval (PMI) Time between death and
discovery of a corpse.
12
Forensic Entomology
  • History
  • China 13th century. sickle
  • Bergeret 1859. dead baby
  • Megnin 1890. fathered forensic entomology
  • Hall 1948. blowflies
  • Greenberg, Nuortowa, Marchenko 70s, 80s

13
Forensic Entomology
Forensic Entomology
Study of insects and their arthropod counterparts
that interact with legal matters.
What is an arthropod?
What is an insect?
14
Forensic Entomology
Arthropoda (phylum)
class - Arachnida (spiders, scorpions) class -
Chilopoda (centipedes) class Insecta (insects)
order Hymenoptera (ants, bees, wasps) order
Blattaria (cockroaches) order Diptera
(flies) order Coloeoptera (beetles)
15
Forensic Entomology
Arthropoda (phylum)
class - Arachnida (spiders, scorpions) class -
Chilopoda (centipedes) class Insecta (insects)
order Hymenoptera (ants, bees, wasps) order
Blattaria (cockroaches) order Diptera
(flies) order Coloeoptera (beetles)
16
Forensic Entomology
Flies
Some flies are attracted to dead bodies.
Carrion Flies
  • Calliphoridae (blow flies)
  • Sarcophagidae (flesh flies)
  • Muscidae (house flies)
  • Phoridae

17
Forensic Entomology
Flies
Some flies are attracted to dead bodies.
Carrion Flies
  • Calliphoridae (blow flies)
  • Sarcophagidae (flesh flies)
  • Muscidae (house flies)
  • Phoridae

18
Forensic Entomology
Phoridae
  • Scuttle flies or coffin flies
  • Take advantage of physical barriers larger flies
    cant get to body

19
Forensic Entomology gt Flies
Calliphoridae (blow flies)
  • Shiny color (bluebottle, greenbottle)
  • Among the first to arrive at a corpse

20
Forensic Entomology gt Flies
Sarcophagidae (flesh flies)
  • Large, gray flies
  • Also among the first flies to arrive

21
Forensic Entomology gt Beetles
22
Forensic Entomology gt Beetles
Coleoptera (beetles)
Arrive early or late in decomposition process,
depending on species
23
Forensic Entomology gt Flies and Beetles
Complete Metamorphosis
  • Eggs
  • Larvae
  • Pupae
  • Adult
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