How glass fractures In order to learn how glass fractures, we must first learn the composition of glass and the different types of glass. Glass is a hard, brittle, amorphous substance composed of sand (silicon oxides) mixed with various metal oxides. When sand is mixed with other metal oxides, melted at high temperatures, and then cooled to a rigid condition without crystallization, the product is glass (Saferstein, 2010). Glass can come in many different forms all of which can range from very brittle glass to bullet proof glass; the stronger the glass, the more ingredients are required and the more complex the process is. The key ingredients in making standard glass or float glass is sand or silicon oxides, soda or sodium carbonate, lime …show more content…
Glass that is broken and shattered into fragments and minute particles during the commission of a crime can be used to place a suspect at the crime scene (Saferstein, 2010). Broken glass particles found on a suspect could make the difference between getting a conviction on a crime committed, if everyone does their part. There are many scientific factors that must be conducted to compare two different pieces of glass in efforts to find a correlation between the two …show more content…
Such knowledge may be useful for reconstructing events at a crime-scene investigation (Saferstein, 2010). In response to placing the bullets in chronological order, I concluded that the bullets were fired into the window in the following order: c,a, and b. I placed bullet hole c as the first shot being fired due to the radial fracture lines forming a wheel spoke at the point at which the glass was struck (Saferstein, 2010). I also chose c as the origin of the three bullet holes because the radial fracture lines are longer and they cut off the radial fracture lines of both bullet holes a and b. I chose bullet hole a as the second bullet being fired because the radial fracture lines are just as long as bullet c and bullet a’s fracture lines are also cut off by bullet c (the origin). Bullet hole a also cuts off the fracture lines of bullet b. Lastly, the final bullet shot was bullet b. I concluded this because it’s radial lines stop at both bullet’s c(the origin) and bullet
Forensic Science Introduction: Someone in a restaurant has suddenly fallen ill and a mystery powder has been discovered with the victim. As the chief investigator, your duty is to identify the mystery substance through a lab. In this lab, it will consist of five known compounds and one unknown compound. Your job is to distinguish which one out of the five substances is the mystery powder. To figure out the mystery matter you will have to compare their physical and chemical properties and match them with the appropriate compound.
The first example of a case that was solved using ballistics is the case of Manuel Rojas versus the death of Valentina Giles Rogue. In this case Valentina was roughly twenty years old and she was at her apartment, she had the simple desire for peace and quiet nevertheless there was noise coming from outside her apartment. There were some drug dealers loitering outside her apartment that was located in Santa Ana and because she spoke to them she ended up getting shot in the chest at a close range. Valentina still continued to climb up her stairs with the wound and died in front of her twenty-four year old son and his wife. The Orange County were unable to link the shooter m. In 2009 the investigators of the case asked Edward for help to link the shooter to the scene. With the help of the company's newly developed ballistics analysis system called IBIS BULLETTRAX-3D the investigators were able to links Manuel Rojas to the murder of Valentina (Forensic technology 2016). The second case example is a case where a man fired a gun eight times into the air in North Charleston, South Carolina in March of 2007. The shell casing were collected and entered into National integrated ballistic information network (NIBIN). On July of 2007 a man shot three people in their apartment so there were no eye witnesses and the investigation did not find a gun. Although
GLASS written by ellen hopkins intermenes the real life struggles that teenagers face everyday, from love to drugs to destructive relationships. Ellen really hits home showing the life of a once 4.0 honors student Kristina; whose life easily got turned upside down from one toxic summer at her fathers that will show the darkest side possible of life. An estimated 12 percent of children in the United States live with a parent who is dependent on or abuses alcohol or other drugs. Based on data from 2002 through 2007, it was to be reported that 8.3 million children under the age of 18 lived with at least one substance-dependent or substance-abusing parent according to Substance Abuse and Mental Health Services Administration (Paragraph 4). The bond between a child and their parents is so pure yet
Crime scenes are known to have many clues left behind. The obvious would be a the body or bodies, clothing, and sometimes even the murder weapon. While these are great way to solve a case there's another kind of evidence; trace evidence. Trace evidence are small pieces of evidence that are laying around a crime scene. There are many types of trace evidence some of them include metal filings, plastic fragments, gunshot residue, glass fragments, feathers, food stains, building materials, lubricants, fingernail scrapings, pollens and spores, cosmetics, chemicals, paper fibers and sawdust, human and animal hairs, plant and vegetable fibers, blood and other body fluids, asphalt or tar, vegetable fats and oils, dusts and other airborne particles, insulation, textile fibers, soot, soils and mineral grains, and explosive residues. Although these are the most common found elements, they are not the only ones. The Trace Evidence Unit is known to examine the largest variety of evidence types and used the biggest range of analytical methods of any unit. materials are compared with standards or knowns samples to determine whether or not they share any common characteristics. In this paper I will discuss the different kinds of trace evidence and how crime scene investigaros use it to solve cases and convict criminal.
In the criminal justice system, the best chance of a fair trial and justice lies within cases that include physical evidence. Physical evidence, whether fibers, fingerprints, or DNA, can give a jury proof beyond a reasonable doubt. Physical evidence can convict a criminal, or it can free an innocent man. It can bring closure to families and to the law enforcement that work the cases. The following cases will show what physical evidence does in a criminal trial and the vast impact it can make. For each case I will examine how the physical evidence was important to the case and whether or not it could have made more of a difference if the presentation of the evidence were different. The five cases are: the Mosley case, the Warren case, the Chandler case, the Frediani case, and the Swift Case.
Therefore, the criminal justice system relies on other nonscientific means that are not accepted or clear. Many of forensic methods have implemented in research when looking for evidence, but the methods that are not scientific and have little or anything to do with science. The result of false evidence by other means leads to false testimony by a forensic analyst. Another issue with forensic errors is that it is a challenge to find a defense expert (Giannelli, 2011). Defense experts are required to help the defense attorneys defend and breakdown all of the doubts in the prosecutors scientific findings in criminal cases. Scientific information is integral in a criminal prosecution, and a defense attorney needs to have an expert to assist he/she in discrediting the prosecution (Giannelli,
When the first responder got to the scene he adimatately meet the 911 caller, who lead him to a car in an apartment parking lot. The car doors were closed and all of the windows were fogged. The police officer used his flashlight to see inside of the car before opening the door. He found a young African American woman who had been shot several times. The officers quickly called for backup, investigators and medical personnel. While awaiting for their arrival he secured the crime scene with caution tape, creating an initial perimeter setup as discussed in lecture two. Once everyone arrived he left it to them to search the car while he talked to the 911 caller, witnesses and others who had information on who had been present in the car. The investigators were able to collect physical evidence of bullets and cartage casings that were found outside the vehicle and inside the vehicle on the floorboard of the driver’s side. The team determined the bullets came from a 40 caliber. Other types of physical evidence that were found on the scene were the bloody clothing on the victim, the victim’s cell phone and fibers in the car from the driver’s side. personnel at the scene crime took several photographs, powered test for finger prints and did a blood spatter analysis. Stewart’s autopsy revealed that she had been shot at close range in the left hand once and in the
1. Often, it is concluded that a lone gunman couldn’t have made the shots in the short seconds of the shooting (Rubinstein 4).
In order for evidence to be used in court, it must be collected and tested by valid methods. The collection of evidence must be completed carefully and properly to prevent cross-contaminating or destroying the evidence. Before evidence can be collected at a crime scene, the area must be secured to ensure everyone stays safe and that the evidence is not destroyed. After the scene is secured by all proper measures, the collection process can begin. The first items to be collected are those that are transient, fragile or perishable. Hair, fibers and small shards of glass are all
In recent years, however, such programs as CSI that follows detectives at the Las Vegas Police Department Crime Scene Investigations Bureau as they solve puzzles and catch criminals. Perhaps one of the most well known shows with a forensic psychology theme, CSI has a large impact on viewers perceptions of forensic psychology. On one hand, the increased popularity of forensic psychology because of the show is good and more people are taking an interest in forensic psychology as a career. On the other hand, the forensic psychology that viewers see every week on television may not be exactly the same as forensic psychology in reality. Particularly programs such as CSI also overstate the ability of “hard” evidence (also known as forensic evidence), such as fingerprints and DNA, to provide evidence of definite innocence or guilt (Trask, 2007). They often disregard other components of the investigative process, such as police questioning, despite these being equally valid to establishing guilt (Nolan, 2006). This over-reliance on forensic evidence, due to the importance of forensic science being dramatized by television crime dramas, is also known as the CSI
National Institute of Justice (2004, June). Crime Scene Investigation: A Reference for Law Enforcement Training. Retrieved June 3, 2011, from http://www.ncjrs.gov/pdffiles1/nij/200160.pdf
Forensic Science, recognized as Forensics, is the solicitation of science to law to understand evidences for crime investigation. Forensic scientists are investigators that collect evidences at the crime scene and analyse it uses technology to reveal scientific evidence in a range of fields. Physical evidence are included things that can be seen, whether with the naked eye or through the use of magnification or other analytical tools. Some of this evidence is categorized as impression evidence2.In this report I’ll determine the areas of forensic science that are relevant to particular investigation and setting out in what method the forensic science procedures I have recognized that would be useful for the particular crime scene.
Many of us enjoy watching crime scene investigation shows, but in the criminal justice system forensic investigation is an essential field that requires upright observations and a prodigious interpretation. Under forensics, it is difficult to blame someone without scientific data. For that reason, Larry K. Gaines author of the textbook Criminal Justice in Action explains the importance of Blood Spatter Analysis. Specialist can learn a great deal about violent crime by examining where blood landed at the scene, the size and consistency of drops, and the pattern of blood spatter (Gaines, 2011). Consequently, an article of the Blood Spatter Analysis will be used to explain the research methodology the author uses to proceed certain investigations.
Forensic science has now been recognized as an important part of the law enforcement team to help solve crimes and cold cases. The advances in technology are being used each day and we must continue to strive to develop better advances in this field. The recent discovery of using DNA in criminal cases has helped not only positively identify the suspect, but it has helped exonerate hundreds of innocent individuals. “With new advances in police technology and computer science, crime scene investigation and forensic science will only become more precise as we head into the future.” (Roufa, 2017) Forensic science and evidence helps law enforcement officials solve crimes through the collection, preservation and analysis of evidence. By having a mobile crime laboratory, the scene gets processed quicker and more efficiently. Forensic science will only grow in the future to be a benefit for the criminal justice
In 1784, someone using a flintlock pistol shot Edward Culshaw. In those days, there were no bullets, as we know them. Gunpowder and a ball of lead were put into the gun’s muzzle and packed with paper wadding. A spark made when the gun’s hammer struck some flint at the back end of the barrel ignited the powder. When the constable examined Culshaw’s wound, he found a piece of newspaper used as wadding to pack the powder in the killer’s gun. The prime suspect in the killing was a man named John Toms. When a piece of newspaper found in Toms’ pocket was compared with the piece found in the wound, the pieces fit together like two pieces of a jigsaw puzzle. Based on the evidence, Toms was easily convicted. The Toms case was probably the first in America in which ballistics was used to solve a crime.