Sunday, December 4, 2011
Creating a profile
In this lab each table was given five similar clues to establish a profile of the perpetrator. Each table got one set of fingerprints, two hair or fiber samples, a torn note, and a liquid smudge on a piece of paper. We were told to analyze each piece. When analyzing we were supposed to create what kind of person would do this, what you knew, what you needed more information for, and what you didn’t know.
Witness experiment
This experiment was designed to see how well of a witness you could be. Each table had magazines and cut out heads of people in relatively the same size. Each person picked their “person” and cut out the hair, eyes, nose, and mouth. We then jumbled the pieces up in the middle and picked random parts to make a “suspect.” The “suspect” was then shown to the person to their left and they had to re-make that person after only 30 seconds of getting to look at them.
Lipstick Lab
All students put on a shade of lip gloss or lipstick in order to make our lip prints visible on a notecard. We each got a half notecard to “kiss” and make a print on. We analyzed each of our own prints to look at the distinguishing characteristics of our lips. We then put each person’s print at our table again onto a piece of paper. We then jumbled up our notecards and had another table decide whose print was whose.
Hair and Fiber Lab
In this lab, we used various types of hairs and fibers to look under the microscope and identify the differences. Some of the hairs we used were Caucasian hair, Caucasian dyed hair, African-american femal hair, African-american male hair, synthetic hair, dog hair, and cat hair. Some fibers we used were nylon, cotton, silk, and wool. We looked at each sample underneath the microscope and recorded on paper what we saw and the differences between them.
Fingerprinting Lab
We used the t-zone of our face to put oils onto our thumbs. The t-zone is the oiliest part of your face, so it makes the print more visible when powder is added. We placed it on a the table and used powder to try to make the print visible so we can lift it. We then took a piece of clear tape and lifted the print and placed it on a piece of paper. Mine did not work very well. The powder should have been finer to stick to the print better.
Poison Lab
In this lab, different stations were set up that held different poisons. Each station had three different samples of potential poisons that we had to identify by using methods such as pH testing and reagent testing. Sugar, cyanide, aspirin, metal poison, iodine, and ammonia are the poisons that we identified in the lab. With this lab, we were able to learn and understand different ways to test drugs that analysts come across in the field.
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