Insect Evidence and Forensic Entomology at Crime Scenes

The video explores the role of insects, particularly blowflies, in forensic investigations. It details how insects are used to determine the postmortem interval by examining their life cycle stages on decomposing bodies. The video also discusses the challenges faced in forensic entomology, such as environmental factors and the impact of concealing bodies in suitcases.

What is the primary role of an entomologist at a crime scene?

• To interview witnesses

• To analyze the insects present to estimate the time of death

• To examine the body for physical injuries

• To collect DNA samples from the crime scene

How quickly do blowflies typically colonize a body in the UK summer?

• Within 12-24 hours

• Within a week

• Within 1-2 hours

• Within 3-4 days

What is the first stage of the blowfly life cycle after the eggs hatch?

• First stage larva

• Adult fly

• Pupa

• Second stage maggot

How long does it take for a blowfly to develop from egg to adult in the UK summer?

• About 2 weeks

• About 10 days

• About 1 month

• About 3 days

Why do blowflies prefer to lay eggs in body orifices?

• Because they have higher humidity

• Because they are easier to access

• Because they are warmer

• Because they are less visible

What is the significance of the temperature changes observed in the piglet case study?

• They help identify the species of insects present

• They show the progression of insect colonization

• They indicate the time of death

• They determine the cause of death

What was the main observation from the piglet case study regarding insect activity?

• Insects formed a maggot mass that moved through the piglet

• Insects only colonized the piglet's head

• Insects were unable to penetrate the piglet's skin

• Insects avoided the piglet completely

How does placing a body in a suitcase affect blowfly colonization?

• It prevents blowflies from finding the body

• It has no effect on blowfly activity

• It delays blowfly arrival by 1 to 3 days

• It accelerates blowfly colonization

How do blowflies manage to lay eggs in a suitcase?

• They use the suitcase's zip to access the inside

• They lay eggs on the outside of the suitcase

• They chew through the fabric

• They wait for the suitcase to be opened

What is a major challenge for forensic entomologists?

• Dealing with environmental and human factors

• Collecting enough insect samples

• Determining the exact time of death

• Identifying the species of insects