ipl-logo

Non Magnetic Powder Lab Report

1267 Words6 Pages

PROCEDURE
1. POWDERING METHOD (MAGNETIC AND NON-MAGNETIC POWDERS)
Fingerprint powder is used on non-porous items of evidence to develop latent impressions, making them visible to the naked eye. This technique will enable the Forensic Scientist to lift, photograph or electronically capture the latent print for preservation and comparison purposes. Powder was chose based on which provides the most contrast.
Powder shall provide the most contrast when compared to the background surface. Black, white, silver/grey, bi-chromatic, fluorescent, and magnetic powders are all available for use. Additionally, depending upon the material of the item either metal, plastic, or glass. The magnetic properties of the powder shall be considered. Magnetic powder may be used on nonmetal items.
The brush was dipped brush into the powder containing vessel. The tips of the bristles must make contact with the powder surface. For non-magnetic powders was used a heavy black …show more content…

The test sample was placed in fuming followed by superglue fuming kit in the fuming chamber. Cyano-Shot activator solution was placed in the middle of chamber and followed by adding activator crystals canister inside it and it was let to sink into the solution. The superglue fuming compound was dropped in a bowl mounted above the activator canister. The fuming chamber was closed. A fingermark sample was deposited onto the door glass of fuming before the chamber was closed. This is for the benchmark as when the benchmark of the fingermark appeared to be visible white colour polymer, so the sample also was produced the same white colour polymer. Then, the fuming was allowed for fifteen minutes to completely react with the fingerprints. After that, the visible fingerprint can be enhanced for the using non-magnetic powder for better ridge details. Lastly, the fingerprint was lifted for preserved and comparison purpose and

Show More
Related

  • Anna Garcia Forensic Evidence

    427 Words  | 2 Pages

    but unlike blood the fingerprint is unique to a single person. The fingerprints that were recovered show the they belonged to anna. After analyzing the patterns of the fingerprint found and comparing them to and all of the suspects. They belonged to Anna. hair was recovered on the scene.

    Read More

  • No Probable Cause To Arrest Hayes Essay

    551 Words  | 3 Pages

    This is a criminal case, in which the Supreme Court ruled that there was no probable cause to arrest Hayes. Hayes did not give consent to be taken to the police station and be detained plus fingerprint. Therefore, Hayed Fourth Amendment rights were violated and the conviction was overturned. Fact of the case: In the 1980’s there was a series of rape and burglary that happened in Punta Gorda Florida.

    Read More

  • Arizona Vs Youngblood Case Study

    1528 Words  | 7 Pages

    There comes a time in the criminal justice system where a law that was written to protect us will be challenged through a court case. That case will eventually make history and will become a reference in future cases with similar dilemmas. In 1983, one particular case met the criteria (Arizona vs. Youngblood). In this case, Larry Youngblood was convicted by a jury in Arizona of child molestation, sexual assault, and kidnapping of a ten-year-old boy. Both a criminologist for the State and an expert witness for the defendant testified as to what they believed the results were from the tests that were performed on the samples shortly after they were collected, they also commented on later tests performed on the samples from the boy’s clothing

    Read More

  • Dna Fingerprinting Lab Report

    1726 Words  | 7 Pages

    This is known because suspect twos DNA traveled the same distance as the crime scene DNA. DNA Fingerprinting Using Agarose Gel Introduction In 1984 Dr. Alex Jeffreys came up with deoxyribonucleic acid (DNA) fingerprinting, which is also known as DNA profiling or DNA typing. DNA fingerprinting is the analyzing

    Read More

  • 15-012345 Frog Murder Case Study

    356 Words  | 2 Pages

    Case: 15-012345 Frog Murder How to be a Forensic Evidence Technician We are going to be working on case 15-012345 today with Deputy Ferriter. Someone last night broke into the school and murdered a pet frog. We are going to be dusting for fingerprints, and walking you through the steps. Step 1: Find a substrate near the area that the criminal could have touched during the crime scene. Step 2: Take a brush and twirl it gently between your hands so the static electricity can move throughout the brush, after doing that, dip the brush gently into magnetic fingerprint dust.

    Read More

  • Christopher Vaughn Case Summary

    978 Words  | 4 Pages

    There are different ways that prints can be developed in crime labs; by the use of traditional powders, fluorescent powders, chemicals, and superglue. They can be viewed under laser and UV lighting. When the finger print analysis was done on the magazine, Christopher Vaughn’s fingerprints did not show

    Read More

  • Forensic Science: The Murder Case Of Leanne Holland

    1915 Words  | 8 Pages

    The murder case of Leanne Holland exposed the ways in which forensic science were both a help and a hindrance to the conviction and subsequent overturning of the verdict, against Graham Stafford. The body of 12-year-old Leanne Holland was found battered and partially naked in scrub 30m off Redbank Plains Rd on September 26, 1991. She went missing on Monday morning on September 23, 1991. According to descriptions, she was last seen wearing a long-sleeved purple jumper, black skirt and no shoes as she headed towards shops just 500m from her Alice St home in Goodna.

    Read More

  • Unknown White Compound Lab Report

    1367 Words  | 6 Pages

    Chemical compounds that are available to determine are CaCO3, CaCl2, Ca(NO3)2, mgCl2, MgSO4, KCl, HCl, HC2H3O2, KNO3, K2SO4, NaC2H3O2, Na2CO3, NaCl, Na2SO4, HNO3, H2SO4, HNO3, H2SO4, NH4Cl, (NH4)2SO4, K2CO3, 0.1 M AgNO3, 0.2 M BaCl, Mg(s), NaOH, and KOH. To start this experiment, start with the flame test by gathering a Bunsen burner and a Nichrome wire. Connect the Bunsen burner with a rubber tube to a laboratory gas. To prepare solutions for the flame test, weigh out 0.205 gram of Unknown Compound using an analytical balance and mixed it into a 140 mL beaker filled with 20 mL ionized water. Ensure that solid is completely dissolved using a stirring rod.

    Read More

  • Richard Ramirez Analysis

    1776 Words  | 8 Pages

    The Richard Ramirez "Night Stalker" case was one of the first major cases to use automated fingerprinting technology (Frese, 2011). Today, the fingerprinting database gives various probable identifications, then a trained fingerprint expert must compare the prints to find a likely identification. Considering that Ramirez's prints were found on the mirror of a stolen vehicle we can conclude that his fingerprints were two-dimensional, therefore the prints are termed as latent or residue prints. The authorities at the crime scene power-dusted his prints considering that is the best physical method for collecting fingerprints. Once analyzed using the ACE-V (analysis, comparison, evaluation and verification) method, the fingerprint expert was able to identify them as belonging to Ramirez.

    Read More

  • Lizzie Borden Trial

    1892 Words  | 8 Pages

    People in the military are fingerprinted, and it is also required for many other occupations and organizations. When it comes time to match a fingerprint with an individual, it is quite easy due to the wide library of fingerprints the FBI maintains. This library contains the fingerprints of “more than 10%” of the U.S. population. For smaller cases, law enforcement are given access to this library directly from a police station ("Forensic Science" [Gale] 18).

    Read More

  • The Pros And Cons Of Fingerprinting

    1172 Words  | 5 Pages

    Fingerprinting is method based on the uniqueness of the skin pattern - that is, each person has a completely individual pattern of papillary lines. These patterns do not change throughout life and have the property of recovering from damage to the skin in its previous form. On the one hand, this method almost completely eliminates the mistake, and on the other hand it is very cheap and easy to use (in contrast the method of identification of a person by DNA). Fingerprinting allows: 1) to identify the person who left the prints, according to the general and particular features of the papillary pattern displayed on them; 2) to exclude individual from among those who have touched the object; 3) to narrow the group of individuals suspected of the particular crime (for instance, provided that the imprint shows traces of a scar, a burn, a wart or some other distinctive feature).

    Read More

  • DNA In Forensic Science

    1116 Words  | 5 Pages

    This can be done by DNA fingerprinting or by collection of body fluids, such as saliva, semen, urine, blood, skin and hair, found at the scene. Secondly, DNA testing can rule out possible suspects as well. DNA testing can be used to free individuals

    Read More

  • Forensic Testing Essay

    1095 Words  | 5 Pages

    D Assessment DNA technology Forensic testing 24.11.2014 Marius Martinsen 10D Introduction: I have chosen to investigate Forensic testing, it is also known as DNA profiling or genetic fingerprinting. During this essay I will discuss what the disadvantages and what the advantages of forensic testing are. I will also talk about how forensic testing is carried out. Forensic testing is used to identify an individual by using the DNA sequences of that person.

    Read More

  • Properties Of Substances Lab Report

    1038 Words  | 5 Pages

    Properties of Substances Express Lab 1)The purpose of this lab was to compare the physical properties of different types of solids and how the properties of solids are determined by their intermolecular forces and their intramolecular bonds. Then we were to classify each type of solid as either ionic, metallic, non-polar molecular, polar molecular, or network. Paraffin wax classified as a non-polar molecular, Silicon dioxide was classifies as a network, Sodium chloride was classified as ionic, Sucrose was classified as polar molecular and Tin was classified as metallic. (2)The intermolecular forces that are present in Paraffin wax are dispersion forces, because it is non-polar and carries a negative charge. Followed by Sucrose that has

    Read More

  • Ionic And Covalent Compounds Lab Report

    902 Words  | 4 Pages

    Properties of Ionic and Covalent Substances Lab Report Introduction The purpose of this lab was to determine which of the following substances: wax, sugar, and salt, are an ionic compound and which are a covalent compound. In order to accurately digest the experiments results, research of definitions of each relating led to the following information: ionic compounds are positive and negatively charged ions that experience attraction to each other and pull together in a cluster of ionic bonds; they are the strongest compound, are separated in high temperatures, and can be separated by polar water molecules. A covalent compound forms when two or more nonmetal atoms share valence electrons; covalent compounds are also

    Read More

More about Non Magnetic Powder Lab Report

Open Document