Fingerprints
TESTING TO SEE WHOSE HAIR IS AT A CRIME SCENE, WHETHER OR NOT IT'S HUMAN HAIR, DNA (DEPENDING ON IF THE HAIR COMES FROM THE ROOT).
The person's finger prints found at the scene was of Alex Garcia. The 10 minutiaes found at the crime scene were exactly alike to those of Alex. A minutiae is a point, or area that can be identified to witness a difference in fingerprints. |
You take a latent finger print by:
finding the chosen print. using dust to lightly brush it onto the print. and using tape to transport the designed print onto the tape, to use at a crime lab. |
Hair and Fiber Analysis
By a hair analysis, you can determine if the hair found at the crime scene is natural or non-human, the ethnicity of the one who had the hair originally, the ancestry of one's hair follicle.
The persons hair found under the microscope was Anna Garcia's. The same patters found under the microscope of the crime scene is the same pattern found on Anna Garcia. |
Shoe Prints
Blood Typing
Stride Analysis
To determine the approximate characteristics of a suspect of a crime, you can use a shoe print. You can tell which way they were headed, and even the height. By finding the height of the owner of the shoe, use a graph that expresses the relation of Height versus Shoe Size. After graphing the points see where the shoe size falls on the graph. That would be the approximate height of the suspect..
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Blood Spatter (Lab)
The effect of height on the diameter of blood spatter evidence at a crime scene.
The purpose of this lab is to explore the relationship between the diameter of a blood spatter drop to the height of which it fell. Blood spatter is used at crime scenes to help investigators to determine the cause of death and help to identify the weapon used. The drops at Anna's crime scene were circular, at 90 degrees; which means that Anna was standing up/over the impact of the blood drop.
If I dropped blood from an increased height, at 90 degrees, the diameter will get bigger and produce a more oddly circular shape.
The materials used in this lab were:
The purpose of this lab is to explore the relationship between the diameter of a blood spatter drop to the height of which it fell. Blood spatter is used at crime scenes to help investigators to determine the cause of death and help to identify the weapon used. The drops at Anna's crime scene were circular, at 90 degrees; which means that Anna was standing up/over the impact of the blood drop.
If I dropped blood from an increased height, at 90 degrees, the diameter will get bigger and produce a more oddly circular shape.
The materials used in this lab were:
- A Pipette
- A Meter stick or Measuring Tape
- Simulated Blood
- White Paper
- Paper Towels
This Height Determination Graph:
On the x-axis is the Height of which the blood fell in centimeters, going by 20. On the y-axis is the Diameter of Blood Spatter in millimeters going by 2's. This graph is showing that on average, as the height of the blood falling, increases; the diameter also graduates. |
My initial hypothesis was partially correct. As the height increased, so did the diameter of the drop. The size stayed circular however. The graph as well as the data table shows why this is correct. A couple drops weren't increasing when the height increased though. I've learned basically that the taller the drop, the bigger. If the diameter of the blood is a certain size, in this example, 11 millimeters, then you can determine that the height of which it fell was approximately 20 centimeters from the ground.
What is DNA? Model Building Lab
Deoxyriboenucleic Acid, commonly known as DNA, is "the blueprint necessary for building all of the cells that make up organisms." Every thing living has DNA. It is made up of nucleotide, which is also the basic structural unit of DNA, a nucleotide is made of a deoxyribose sugar molecule, a phosphate group, and a nitrogenous base. It's used to identify a person.
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Whose DNA Is It?
DNA profiling is the analysis of DNA from samples of body tissues or fluids in order to identify individuals. Polymerase Chain Reaction, or PCR, is used to make a larger DNA off of a single copy or a few copies of a piece of DNA across several orders of magnitude. Gel Electrophoresis are DNA fragments that are indistinguishable, processed through agarose gel, which acts like a screen, they get a positive charge, since DNA has a negative charge, and move at their pace to the positive size in the electric field. You would use this method to determine, along with the DNA marker, whose DNA matches as close. This is a very useful method in solving a crime and seeing who was involved.