Forensic Entomology: Insects as Evidence
Terms in this set (31)
Forensic _________________ apply their knowledge of entomology to provide information for crinimal investigations.
Identification of insects at various stages of their ____________ ___________, such as eggs, larva, pupa, and adults.
Collection and preservation of insects as _______________.
Determining an estimate for the postmortem interval or _________ (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.
__________________ in court to explain insect-related evidence found at a crime scence.
Forensic entomologists use their knowledge of insects and their life cycles and ____________________ to give them clues as about a crime.
Most insects used in investigations are in two major orders: ____________ (flies) and ________________ (beetles).
Species __________________ may also provide clues for investigatiors. Some species may to feed on a _________ corspe, while another species may prefer to feed on one that has been dead for two weeks.
Investigators will also find other insect species that __________ on the insects feeding on the corpse.
______________ data is also an important tool in analyzing insect evidence from a corpse.
Investigators will make note of the temperature of the _______, ground surface, the interface area between the body and the ground, and the ________ under the body as well as the temperature inside any _______________ masses.
air, soil, maggot
They will also collect weather data related to daily __________________ (high/ lows) and _______________ for a period of time before the body was discovered to the time the insect evidence collected.
Some factors that could affect a forensic entomologist of PMI:
Clothing, drugs, temperature
What is PMI? What does it tell you?
It is the primary use of entomology and it is used to estimate the time since death, or postmortem interval (PMI) during death investigations.
Blow flies are attracted to dead bodies and often arrive within _______________ of the death of an animal.
They have ________________ life cycle that consists of eggs, larva, pupa, and adult stages.
1st- Adult flies lay eggs on the carcass.
2nd- Eggs hatch into larva (maggots) in ____-____ hrs.
_____ - Larvae continue to grow and molt (shed their exoskeletons) as they pass through various instar stages.
1st Instar- 5 mm long after ________ days.
2nd Instar- 10 mm long after ________ days.
3rd Instar- 14-16 mm long after ________ days.
______ - The larvae (17 mm) develop into pupa after burrowing in surrounding soil.
5th- Adult flies emerge from pupa cases after ____-_____ days.
Used to collect crawling insects
Used to store live species
Used to take temperatures (air, soil, masses)
Used to collect flying insects
Used to dig up soil samples
Used to collect and preserve specimens
Used to collect weather data
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