Source: fbi.gov
Students from the below groups will receive PIN numbers via email weekly to access activities on my iDoceo Connect platform and submit their exercises for correction.
404, 407, 412, 420, 435, 447P, 462, 480 and 481
The solutions to exercises will be published when the above groups have submitted them.
I. Forensic Toxicology
Adapted from http://www.exploreforensics.co.uk
Comprehension. Answer the following questions about the text.
1. What do toxicologists need to collect in order to begin testing?
2. What are the three main sources of body samples used in toxicology testing?
3. Any other sources?
4. What can be done to determine what a person ingested before their death?
5. For each of the types of samples identified in question 2, identify its main advantages over the other techniques.
Do this exercise and then discuss your answers with your nearest classmate.
Send your answers to your teacher using the dedicated iDoceo Connect platform (only for groups specified above).
II. Fingerprint analysis
Do you know the names of the different tools you can use for fingerprint analysis? Compete against other students for fastness and accuracy in this challenge:
Use this worksheet to guide you through a video demonstration of how to lift fingerprints. This sheet will help you to understand and then explain how experts present their forensic techniques.
The ideal surface for fingerprint lifting is...
Level 1 – Plexiglass: Say whether the following sentences are true or false.
a. You have to put a lot of powder on the object straight away.
b. The best movement to fully develop the print depends on the pattern of the fingerprint.
c. The tape used to lift fingerprints is the same as packing tape.
d. When lifting the print, if there is any texture in the fingerprint, you want to move your finger across the print as quickly as possible to avoid destroying the texture.
e. Once the tape has been transferred to the acetate, you have to make sure to remove any air bubbles that may be there.
Level 2 – Mikrosil
a. Why are they using black powder instead of white powder?
b. What is black powder made of?
c. In which situations is Mikrosil used?
d. What kind of impression did they take with Mikrosil in the break-in case Matt Steiner mentions?
e. Once the fingerprint has been recovered using Mikrosil, what would crime scene technicians do with it?
Level 3 – Curved bottle: Complete the transcript
Level 4 – Bloody fingerprint
a. Complete the following paragraph to explain the difference between patent, latent, and plastic prints.
b. Which of the following is true?
c. What expression can you use in English to refer to evidence which is very incriminating?
This type of evidence is evidence.
d. What does the chemical they’re using contain and how does it react with blood?
e. Once the patterns have been developed using leucocrystal violet, what would crime scene technicians do?
f. How are fingerprints then analyzed?
From the article “The Fine Print” published in Nature 464, 344-346 (2010).
Do this exercise and then discuss your answers with your nearest classmate.
Send your guesses to your teacher, using the dedicated iDoceo Connect platform (only for groups specified above).
Identify the suspect that matches the crime scene fingerprint and justify your answer by encircling as many minutiae reference points (called ridge characteristics in the figure above) shared by the crime scene fingerprint and the suspect’s fingerprint.
It is very easy to create high-quality fingerprints to incorporate into the project or to identify the overall pattern in your fingerprints. For this, you will need a piece of paper, a pencil, and clear tape.
If you want to identify the overall pattern in your fingerprint, know that loops represent about 65% of fingerprint patterns, whorls 30%, and arches 5%.
Do this exercise with your team and then present your findings to your teacher and other teams.
TIP
You can re-use this exercise as part of your project. Fill in with your own information about your investigation
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