what we did
For this project we were given information on fake murder made by our teacher and instructed to come up with a conviction of one of the people involved using the evidence and information provided.
how we did it
We were given information on evidence found such as ...
. Fingerprint found on broken glass
. A note
. Three different types of pens (assuming one was used to write the note)
. Two types of blood found on murder weapon
. Strand of hair
. Karyotyping (detect chromosomal abnormalities)
to do some of these things we had to learn how to find out if things how to determine how to do some of the things the FBI actually does or at least how to get as close to it as we can in a classroom. We learned how to do finger printing, chromatography, blood typing and DNA sequencing. Chromatography is a process by which you separate a mixture by passing it in solution or suspension or as a vapor (as in gas chromatography) through a medium in which the components move at different rates. We used chromatography to determine which pen was used to write the note left at the scene. For this process we put a small amount of isopropyl alcohol at the bottom of a small beaker. The next step is to place a strip of chromatography paper with a dot from each pen found at the crime scene inside the beaker just barely in the alcohol, with the dot at the bottom. Allow the solvent to move up the paper for at least 10 minutes. You then measure the distance the solvent traveled and the distance the pen ink traveled. For the blood typing portion we were determining the blood type of the people at the scene due to blood samples found. In order to find a person's blood type you put five drops of blood into a well and one drop of selected antiserum (anti-A or anti-B) to the well and rock to mix. If it reacts to the serum, gets clumpy, then it is that type. To obtain fingerprints we would look at the print under the light microscope at 4x and 10x power. We would then Identify recognizable features from fingerprint( whorl, loop, arch). Then dust it with fluorescent powder and feather duster and photograph the print through the amber shield on the microlight. You then lift the print off the slide with the lifter film, peel off the protective backing and place the sticky side of the lifter film on print then lift it and fold down on the pre attached lifter card. The final steps are then to attach label and compare the print to prints taken from suspects at the crime scene.
. Fingerprint found on broken glass
. A note
. Three different types of pens (assuming one was used to write the note)
. Two types of blood found on murder weapon
. Strand of hair
. Karyotyping (detect chromosomal abnormalities)
to do some of these things we had to learn how to find out if things how to determine how to do some of the things the FBI actually does or at least how to get as close to it as we can in a classroom. We learned how to do finger printing, chromatography, blood typing and DNA sequencing. Chromatography is a process by which you separate a mixture by passing it in solution or suspension or as a vapor (as in gas chromatography) through a medium in which the components move at different rates. We used chromatography to determine which pen was used to write the note left at the scene. For this process we put a small amount of isopropyl alcohol at the bottom of a small beaker. The next step is to place a strip of chromatography paper with a dot from each pen found at the crime scene inside the beaker just barely in the alcohol, with the dot at the bottom. Allow the solvent to move up the paper for at least 10 minutes. You then measure the distance the solvent traveled and the distance the pen ink traveled. For the blood typing portion we were determining the blood type of the people at the scene due to blood samples found. In order to find a person's blood type you put five drops of blood into a well and one drop of selected antiserum (anti-A or anti-B) to the well and rock to mix. If it reacts to the serum, gets clumpy, then it is that type. To obtain fingerprints we would look at the print under the light microscope at 4x and 10x power. We would then Identify recognizable features from fingerprint( whorl, loop, arch). Then dust it with fluorescent powder and feather duster and photograph the print through the amber shield on the microlight. You then lift the print off the slide with the lifter film, peel off the protective backing and place the sticky side of the lifter film on print then lift it and fold down on the pre attached lifter card. The final steps are then to attach label and compare the print to prints taken from suspects at the crime scene.
what i learned about
I learned a lot through this process. I learned a lot of what Huntington disease is what affects it has on the body. I also learned a lot about the process of how to determine if someone is guilty in a murder. I also learned how to detect chromosomal abnormalities in a person.
what i liked
I loved the idea behind this project and I think it was extremely interesting and it could possibly be something I could do in life.
what i wonder
I wonder if we could have been given a little more information on the murder because some ends were very gray.