4.06 Lab
~~~~~~~~~~
Lab 1
1.Which of the three types of fingerprints was the fingerprint that you examined (loop, arch, or whorl)? Within that print, what minutiae did you see?
- Whorl, and a core and a delta.
2. Compare the print of your helper with your own. Describe the similarities and differences between the two fingerprints.
- Loop, and we both have a core, but she has an island.
3. Imagine that you are Alphonse Bertillon and you are trying to explain why you think fingerprints can be so useful to help solve crimes. What would you say to persuade them? Pretend you are explaining to someone who has never noticed fingerprints or thought about what they are.
- A fingerprint may be small and unnoticeable to the eye, and even look like many other peoples, but they are in fact very different. Every fingerprint has a different pattern that is unique and unlike anyone else’s. I compared two fingerprints and found that they may look alike from afar, but up close one goes one way, while the other does something else and completely different.
Lab 2
1. Name and describe the four main components of blood.
- Red blood cells: contain hemoglobin, a protein that binds oxygen,
White blood cells: fight infection
Platelets: help the blood to clot, if you get a wound for example
Plasma: contains salts and various kinds of proteins.
2. What antigens and antibodies determine blood type? What are the antigens made of?
- B antigen, Rh antibody, A anti body, A antigen
3. How is blood type determined? What happens if someone is given the wrong type of blood in a blood transfusion?
- By what type of antigens and antibodies are in their blood. And they can die.
4. Explain how you did in the game?
- I did not do very well. I wasn’t sure what I was doing so I kind of just went with it.
Lab 3
1. What common misconception does the law enforcement course on creating blood spatters dispel?
- That blood splatters always mean the same thing.
2. What is the maximum speed that blood can travel? What can be learned from the shape of the drop?
- 25.1 feet. What happened and how a weapon was used.
You May Also Find These Documents Helpful
-
There are only three basic patterns and they are loops, arches, and whorls. Loops cover about 60-65 %, whorls cover about 25-30 % and arches cover 5-10% of all fingerprints. These classifications can be divided even further like plain and tented arches, or radial and ulnar patterns. An example would be that an examiner found a set of fingerprints on a glass. Now they will be able to compare the prints to see if it has the same print pattern as the offender, which is a loop pattern. The loop pattern is a fingerprint class type, along with the arch and…
- 1049 Words
- 5 Pages
Good Essays -
When I was dusting my apartment for prints I found about 5 different prints and 2 partial prints. I found one partial print on the glass on my coffee table in the living room and one partial print on the night stand in my room. I found 2 prints on the glass on the sliding door to my patio and 1 print on the mirror in the master bathroom, 1 print on the back of a CD found on the end table in the living room and 1 print on the dining room table in the. I went to JoAnn Fabrics to get a Slinky Science fingerprint science kit so I could use the powder and the feather from the box. The powder came in a bottle so it made it really hard to get prints and I actually had my boyfriend put prints on the things I listed so I could use the powder and the powder was also white and made it hard to see. When I used the feather it would smudge the print and I would have to try and use it a different direction. If I were to side to side with the feather it would smudge the print but if I would go up and down it would push the powder away so I was able to see the print better but not clearly. I did not find any prints in my apartment due to my boyfriend cleaning everything. This is why I only find the prints I did because I asked him to put the prints there. Yes I could tell the difference between the prints if I were to put my print right next to it. My finger print has loops and my boyfriend’s prints have tent arches on them. Some of the surfaces that I would think I would find prints on are door knobs, TV, the handle on a microwave, the keys to the car, the thermostat and light switches, books, cell phones and you could also get prints off of duct tape and the door handles of a car that has metal handles and you can get prints off of garbage bags also and DVD cases. When I was doing this assignment I found that trying to get a print from surfaces…
- 474 Words
- 2 Pages
Satisfactory Essays -
1. What are some of the challenges with fingerprint evidence? What is science doing to make fingerprint analysis better?…
- 316 Words
- 1 Page
Satisfactory Essays -
Answer: Three types of fingerprints found in the human population are loop where 60 to 65 percent of the population has them, whorl where 30 to 35 percent have them, and arch where about 5 percent have them.…
- 391 Words
- 2 Pages
Satisfactory Essays -
Since the beginning of the 19th century, criminalists have been using fingerprints to identify and capture criminals. It has proved that so far, fingerprints are unique and nobody will ever have the same exact print. With this as a fact, fingerprints have helped police and investigators solve many crimes including the case of Lucille Johnson(1), the Stratton Brothers case(2), and the Carroll Bonnet case(3).…
- 335 Words
- 2 Pages
Good Essays -
The biggest assumptions about fingerprints are that fingerprints are “infallible,” or dependable, and “no two people have the same fingerprint.” One of the biggest problems with these assumptions appears in the Madrid bombing…
- 599 Words
- 3 Pages
Good Essays -
In a court of law, the results found in the comparison of fingerprint evidence is much more than the subjective opinion of a forensic examiner. As results are not based on personal opinion, but rather on an evaluation employing scientific principles to identify characteristics found on a fingerprint, an examiner’s opinion remains objective using knowledge and skills acquired through training, education, and experience. Expert testimony regarding friction ridged skin evidence has been both acknowledged and accepted as a reliable form of physical evidence as it can be reproduced.…
- 274 Words
- 2 Pages
Good Essays -
3. Imagine that you are Alphonse Bertillon and you are trying to explain why you think fingerprints can be so useful to help solve crimes. What would you say to persuade them? Pretend you are explaining to someone who has never noticed fingerprints or thought about what they are.…
- 632 Words
- 3 Pages
Good Essays -
Dror was not trying to challenge fingerprint analysis as a science or its reliability but instead its ability to be influenced by the many elements that can affect those who examine the data. The possibility of falling vulnerable to psychological and cognitive bias exists when evaluating fingerprint data. External influences can cause an expert to make an unintentionally biased decision. Similarly, context, motivation, and emotions can distort perception and judgments causing experts to make mistakes in their evaluations (Ladwig, 2017). People can be corned into a frame of mind that can affect how they view and interpret information. Of course, this occurs on a subconscious level but is significant in evaluating the issues in fingerprint analysis. Therefore, it is important to apply and learn the cognitive and psychological influences in the processing of fingerprint analysis. There are many errors that experts can make in fingerprint analysis whether intentionally or unintentionally. These errors may stem from negligence, incompetence, cognitive and psychological phenomena and even a lack of accountability on the criminal justice system. Even though these vulnerabilities exist, fingerprint analysis is more reliable than eyewitness testimony. In forensic science, much of the data evaluated can be susceptible to human bias and nothing is ever 100% accurate. However, eyewitness misidentification contributes to 75% of wrongful convictions (Schwartz, 2017). It is not always possible for an eyewitness to accurately recollect events from a past crime and provide testimony that is completely reliable. There is an extraneous number of factors that can affect eyewitness memory. Many of these factors are both within and not within the control of the criminal justice system but highly affect a witness’s testimony. To conclude, both fingerprint analysis and eyewitness memory can be reliable sources but are never 100% dependable. This can be seen by all the…
- 791 Words
- 4 Pages
Good Essays -
The collection is accomplished by a type of ink or charcoal rubbed on the finger then placed on a sheet of paper. The ink is used to expose the different aspects of the fingerprint, to darken and make the details more visible. The first step is to analysis the fingerprint and make sure the print is suitable. This may also help uncover details like scars and creases that help with the next step of comparison. In the step of comparison/classification an analysist will compare the print side-by-side and note each characteristic that may make it more unique and classify it into its group. The third step is evaluation. Depending on the purpose of the fingerprint, in a criminal process you are determining whether the prints match to the scene and the criminal. In the identification process you would determine if there were enough similar qualities to prove heredity. The last step is verification, which is when another examiner verifies or agrees with your…
- 647 Words
- 3 Pages
Good Essays -
This research paper will discuss the life and career of the renowned forensic scientist Sir Francis Galton, one of the Victorian Age’s most eccentric and prolific scientific minds. This will discuss his early life in Birmingham, England, his formal education in London, his scientific training and discoveries, his enduring legacy in the study of fingerprinting and eugenics,…
- 1494 Words
- 6 Pages
Powerful Essays -
Ridge characteristics or minutiae are the ridge endings, enclosures, and other details that make up a fingerprint.…
- 438 Words
- 2 Pages
Satisfactory Essays -
The current methods of fingerprinting that involve subjective comparison and matching of fingerprinting has led to disapproval of the method. Extensive testing has shown that the results of fingerprint testing are not valid (Schmalleger, 2011). Fingerprint matches are now being done by experts, those fingerprints that have been previously been examined to make identification of suspects were presented to the same experts in a different context and the results were different. Similarly, DNA evidence for identification of criminals has been marred by several problems. Surreptitious DNA collecting, presentation of partial DNA profiles, and fake DNA evidence; cast doubts on the DNA evidence presented in courts (Schmalleger, 2011).…
- 593 Words
- 3 Pages
Good Essays -
What is blood? Blood has four main parts,red blood cells, white blood cells, plasma,and platelets. The red blood cells have two main functions, one,it takes the oxygen which is healthy for the body and delivers it throughout the body. The second main function is to drop off the unhealthy carbon dioxide into lungs so the body removes it from the body when it exhales.White blood cells help fight infections by attacking bacteria, viruses, and germs that invade the body. White blood cells can detect a hidden virus and help cure it. When we get blood tests they measure how much white blood cells we have to make sure you have enough.Plasma is a light yellow liquid, similar to the color of apple juice. Along with water, plasma carries salts, hormones,…
- 220 Words
- 1 Page
Satisfactory Essays -
Fingerprints are impressions created by ridges of the skin. The ridges are in the tips of the fingers, palms of the hands, and the sole of the feet. These ridges form before a baby is born. They do not change, but they can become larger. There are three different types of ridges in our population, loops, whorls, and arches. Crime investigators can save fingerprints by brushing powered in place with either camelhair or a fiberglass brush. Prints can be seen in many different ways. One way is iodine; it produces a purple vapor that interacts with a component of the fingerprint to reveal a print. Also, ninydrin, which reacts with amino acids in the print to form a blue purple color. Silver nitrate is another example; the chloride ion of salt will react with silver nitrate to produce silver chloride. Silver chloride is colorless, but can be seen with an ultra violent as a black or reddish color. The last one is super glue; it can be heated in an enclosed area that contains the evidence in question. It appears in an off-white shade. The first year of finger print identification began in the United States in 1902. They first started using fingerprints for the identification of criminals. Fingerprints now go through a process called the Integrated Automated Fingerprint Identification System. Fingerprints are sent through electronic mail, processed on IAFIS, and response is returned to the contributing agency after two hours or less for electronic criminal fingerprint submissions and twenty-four hours or less for electronic civil fingerprint submissions. This system helps in many ways, it helps identify the criminal, and also it helps keep a record of this person electronically. The FBI, CSI, and many more use this. They can search someone’s fingerprint any where in the world within 30 minutes, with this fingerprint processing system. About one in six American’s fingerprints are on file…
- 370 Words
- 2 Pages
Satisfactory Essays