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Crime scene investigation process
Crime scene investigation process
Crime scene investigation process
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It’s a rainy morning. I prepare myself for what’s about to happen in the woods with my getaway vehicle driver. We finally make the drive towards the planned location. In the early hours of 4:48 a.m. I enter the 24-hour bank armed with a pistol hidden in my coat. I am wearing a wig, makeup, and prosthetics to hide my appearance. I approach the counter where a banker stands on the other side. I hand the banker a note to give me the money from the vault. They walk slowly over to the door in the back and I follow them. No one in the bank has noticed this. He opens the vault, but seems to have a change of heart as he gets into a struggle for my weapon. After some fighting, I get the gun aimed at him and fire from close range. I run in, take some of the money, and get out in the confusion. I hop in the getaway vehicle before any police arrive. We …show more content…
Forensic experts can use the tracks left on the road to determine the sort of tires on the vehicle. Using the track width and wheelbase, the type of car can also be identified. This can give police the direction that I got away in as well. My shoes left mud prints on the floor of the bank because I was in the woods as it was raining. This gives police an idea of my foot size and height. It can also tell them if I was injured, the way that I walk, and the wear pattern on my shoes. The trajectory of the bullets I fired into the victim are analyzed by experts. The intensity of the wound can determine how close I was when I fired. The gunpowder residue on the victim also indicates I was at point blank range. The bullet is extracted from the victim and processed. The make and caliber of the bullet can be determined so the police know what type of firearm I used. The rifling marks on the bullet will also match up to my weapon if they find it. Because of all my mistakes at the crime scene, police are able to find and apprehend
Forensic anthropologists will use their skills and education in order to discover the different traumas that can occur to bones. The different types of trauma that will be discussed in this paper are projectile, sharp and blunt. Projectile trauma is most associated with firearms and bullets. Knowing what type of projectile caused the injury to the bone can help in locating the type of gun used, which can lead to a suspect. “When faced with a skeleton containing projectile wounds, forensic anthropologists should aim to supply as much information concerning the causative weapon as possible law enforcement officials.” according to Introduction to forensic anthropology (Byers, 2011, p. 248)
The pattern that the blood gives off gives forensic scientists the tools that they need to help solve cases. Investigators can find clues to a murder in a number of different ways. Typically they find out how many times someone has been stabbed or how many blows they received. Through the count of the times the action had been performed, they can come to an understanding of whatever hand the suspect was using. Other information can tell how the suspect was standing over their victim during the time of death.
If there was no weapon found at the scene and there are other evidence clues that lead to a suspect, and if the suspect had a firearm the forensics team would get a warrant to retrieve the weapon so it could be tested. When the weapon is being tested, it will allow the the bullet have individual marks that will be compared to the ones found at the scene. All of these comparisons are done under a microscope since technology has improved and it is easier to make matches. According to Young & Ortmeier (2011) “class characteristics include weight of the projectile, direction of twist of the riffling, degree of twist of riffling, number of lands and groves, and width of lands and groves.” Even though guns from the same manufacture will never have the same riffling, lands or grove. When evaluating two cartridge casings the examiner will be looking for manufacture, the size of the firing pin as well as the location. The FBI has made a integrated ballistic identification system (IBIS) it's a database that helps crime labs with comparisons where it proves one gun being used in many crimes. In addition, gunshot residue is helpful solving crimes because gunshot residue can be chemically tested. If an individual has gunshot residue it doesn't prove he or she shot the victims, it just means that they were along the premises while the gun was fired. Another
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
If handled with care the evidence can be the best assistance to the crime investigator and can be used as a major proof in court. To improve the investigation any detective or expert has to admit the necessity of the non-movable items observation and processing apart from the regular movable evidence collection.
Crime scenes are known to have many clues left behind. The obvious would be the body, clothing, and sometimes even the murder weapon. While these are great ways to solve a case, there's another kind of evidence: trace evidence. Trace evidence is 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, Although these are the most commonly found elements, they are not the only ones.
The criminal justice system has changed a lot since the good old days of the Wild West when pretty much anything was legal. Criminals were dealt with in any fashion the law enforcement saw fit. The science of catching criminals has evolved since these days. We are better at catching criminals than ever and we owe this advancement to forensic science. The development of forensic science has given us the important techniques of fingerprinting and DNA analysis. We can use these techniques to catch criminals, prove people's innocence, and keep track of inmates after they have been paroled. There are many different ways of solving crimes using forensic evidence. One of these ways is using blood spatter analysis; this is where the distribution and pattern of bloodstains is studied to find the nature of the event that caused the blood spatter. Many things go into the determination of the cause including: the effects of various types of physical forces on blood, the interaction between blood and the surfaces on which it falls, the location of the person shedding the blood, the location and actions of the assailant, and the movement of them both during the incident. Another common type of forensic evidence is trace evidence. This is commonly recovered from any number of items at a crime scene. These items can include carpet fibers, clothing fibers, or hair found in or around the crime scene. Hairs recovered from crime scenes can be used as an important source of DNA. Examination of material recovered from a victim's or suspect's clothing can allow association to be made between the victim and other people, places, or things involved in the investigation. DNA analysis is the most important part of forensic science. DNA evidence can come in many forms at the crime scene. Some of these forms include hair; bodily fluids recovered at the crime scene or on the victim's body, skin under the victim's fingernails, blood, and many others. This DNA can be the basis of someone's guilt or innocence; it has decided many cases in the twentieth century. As the times continue to change and the criminals get smarter we will always need to find new ways to catch them. Forensic science is the most advanced method yet, but is only the beginning. As the field of science grows so will the abilities of the
Truck driving is a difficult job which requires great responsibility of transferring the goods from one place to other far place with proper safety. Genuine CDL training is required by every aspiring truck driver to attain essential skills as a professional driver. These training programs are meant not only help the students learn about the possible ways to handle and manage their trucks in most adverse traffic and weather conditions, but also, this training helps them to learn how to prevent any major loss of the goods during the transference.
Much like in Toms case, most investigations start with a crime having been committed. Forensic ballistics and firearm investigation start when there are bullets, cartridges, a weapon, or any combination of the above found at a crime scene. With the evidence, a crime lab can search for clues on these items that could lead to a suspect or possibly prove that the items were used in the crime. By comparing the markings on bullets or cartridges found at the scene with those fired from a suspect’s weapon, a ballistics expert can often determine if the rounds came from the same weapon. Just the act of cycling a cartridge through a weapon without firing it can leave permanent scratches in the case that are unique to the weapon.
Crime investigators have the job to solve crime and find the suspect responsible. Sometimes the offense is very difficult to solve, but with the right pieces of evidence and tools, the investigation can be answered a little more easily. The use of fingerprints is a main tool used at crime scenes. Investigators find these at the actual crime scene and analyze them at the lab to determine whom the prints belong to. Each person has an individual print which is why this is a very useful piece of evidence. Sir Francis Galton found that the prints could be categorized into different types as well as different groups. The research of fingerprints from decades before has shaped the way detectives identify suspects and victims.
For most of us we have heard the word ballistics throughout our lives. In most cases from television shows, like CSI, Law & Order, or The First 48, but what is ballistics? Ballistics is the part of Forensic Science that handles firearms and how they are used, why they are used, and why they are used repeatedly in the practice of murder. Many people have no idea that when a victim is shot the wound and the circumstances of the victim can say a lot about the nature of the firearm that was used. Especially, if the firearm has been left at where the crime occurred, which happens if the criminal panics. A weapon can provide a lot of important information about the individual who committed the crime. Although, there are four types of ballistics,
As far back as 1832, James Marsh was the first to use forensics at trial to give evidence as a chemist in 1832. Since that time forensic science and evidence has come a long way in various ways and technology to help in determine if the suspect is guilt or not, through such things as DNA testing, blood, and fingerprints. The first forensic police crime lab was created in 1910. The contributions of Dr. Edmond Locard, a French scientist and criminologist, proposed that “everything leaves a trace”. This principle is still valid today as it was so many years ago. No matter how small, the specialized trained technicians and investigators can take these methods and go to a crime scene to get evidence. “Forensic science is the application of sciences such as physics, chemistry, biology, computer science and engineering to matters of law.” (Office of Justice, 2017) These different sciences can help achieve and assist in solving a case. Forensic science has also the ability to prove that a crime was committed, it can find the elements of the crime, it can help place the suspect at the scene and whether the suspect had any contact with the victim. However, in the last several years the techniques and with the use of technology the evidence that forensic science uncovers can also exonerate an innocent individual who has been falsely accused of the
It proves a crime has occurred and can go back to who committed it. Trace / Contact evidence was recognized by Edmund Locard. He stated that every contact left a trace, but also the suspect takes a piece of the crime scene away with them. This is very evident with my case. Testimonial evidence are witness statements.
Getting a driver’s license can be the most exciting part of a teens life. But what do teens have to do beforehand in order to obtain that license? For some, it's months of training and for others, they can complete everything within a few months. But does all that training make teens better drivers? The three main reasons why more drivers education for teens is not beneficial are: restrictions for teen drivers make it harder on parents, teens have to be able to get around without their parents, and not all teens need more drivers education.
investigators take from the crime scene. With scientific methods it helps investigators to produce a