Research Paper On Luminol

For our science project, we chose to do one that included luminol. Before we started, we found 3 cites, stating,” luminol will preform better in extreme heat than it does in room temperature or ice water.” Also one cite says,” It is used by crime scene investigators to discover spots of blood, even spots that may have been washed.” The last cite writes,” It was concluded that an inverse relationship exists between surface temperature and the reaction rate of the Luminol test.” Our question/ purpose was,” How does temperature affect luminol?” My hypothesis was that I thought that the warm water would affect the luminol more than the cold water.

294). This means even after a week the blood has been cleaned up, luminol can still detect it. Also after applying luminol, the area needs to be darkened so that blue glow can be emitted. “The iron from the hemoglobin in the blood causes luminol to glow, so a blue glow is produced when the solution is sprayed where there is blood. Only a tiny amount of iron is required to catalyze the reaction” (Helmenstine, 2012). The use of luminol revealed that there were blood stains on the bed sheets and suspected that the woman was killed in her bedroom and that she did not go to work that day or leave the house.

When people usually hear the word forensics they usually automatically visualize crime scenes filled with things that can vary from blood, bullets, fingerprints ect. Unfortunately, it is not as cut and dry as you think, you're only seeing a small piece of the picture. The subject of forensics itself is very broad and actually involves a variety of different sciences all mixed together including, biology, chemistry, genetics, toxicology, phonetics, medicine, engineering, anthropology and many more. It is one of the fields of law enforcement, were technology and crime-solving all come together as one. Gathering the information needed to figure out what happened and the methods used to connect pieces of evidence to the crime scene were also not

Forensic science can be defined as the relationship between law and science; it answers the questions of how, why and who committed the crime, with the input of multiple actors. However, there are currently problems with

The black 9mm semi-automatic gun should be safe before rendering to the laboratory for fingerprints and tool marks. I would not attempt to recovery any prints at the scene from this weapon. It should be unloaded and packaged in a paper bag or cardboard box. It would be much safer in a cardboard box, transported to the laboratory and should then be placed in a Cyvac for Super Glue Fuming, to be processed for fingerprints.

Forensic Science has contributed to our world a great deal. People often misunderstand Forensic Science and believe it is much more capable than it really is. As a matter of fact what you see on T.V. is around 80% false or over exaggerated in some way. To Start of, Criminal Investigation is the largest and most known form of Forensic Science. Some of the more known areas include; Fingerprinting, Ballistics, DNA Identification, Fiber Samples, Computer Animation, Documentation analysis, etc. To get this out of the way in the beginning, what you saw on last night’s law and order is far from the truth. Things they do in a matter of hours take months at a time, and most of the time aren’t even plausible concepts.

As human overpopulation increases, there will be a lack of resources and basic necessities that will become scarcer elevating crime rates. The broad field of forensics has numerous jobs that specialize in a specific duty. It provides and analyzes evidence in laboratories or offices that helps both state and local police departments solve crimes. As technology advances it also aids in the advancement of forensics. Forensic Science Technicians are required to have a variety of distinctive skills to assist in criminal investigations.

To determine the nature of the ink sample, we used paper chromatography to separate and examine the various pigmented chemicals in each possible type of marker. After careful cross-examination, we determined that ink sample B (the ink found at the crime scene) matched the ink sample of the Vis-à-vis marker. Both ink samples displayed a range of pigmentation from light to dark grey, with a bright blue rim on the ethyl alcohol chromatography test and a yellow-pink-magenta-purple-blue progression on the water chromatography test.

The older method called most commonly known in the field “stringing” has proved to be a solid and reliable way to demonstrate the convergence of blood spatter for many years. Basically after the directionality and angle of impact of a stain is determined, The Crime Scene Analyst gets a coloured string (which can be red like its seen on T.V) to the point of impact. The analyst than can run it backwards to a termination point (for example the floor). After attaching multiple strings to the area where all the strings can be properly photographed. The strings can be used in different reconstruction events on the scene for example bullet trajectory can be reconstructed with the use of strings. This process shouldn’t begin until all of the samples (stains) have been properly recorded and collected. The stringing method of reconstruction is commonly one of the last tasks done by a Crime Scene Analyst. (Parkinson, 2003)

Firearms that are left behind at a crime scene can be extremely helpful. This evidence includes not only the firearm itself but also the ammunition used in the firearm, componets that make up the firearms, and the residue that comes out when the

Projected stains are made from uses of large amounts of force. A basic bloodstain pattern is known as transfer or contact. These are made when someone walks through a puddle of blood leaving footsteps or trails. Gunshot spatters are very common in crime scenes, and give off a sort of mist effect. Sources of blood can reveal the origins of whatever it is investigators are looking for. (Renee Blake)

In many court cases a forensic scientists is the one on the scene collecting finger prints, photos, blood samples and other evidence; for the research and evidence to be the biggest part of the job it’s the biggest issue in the field, which can be easily solved by increasing funding. We now where in many cases where these flaws happened and the many innocent people who were convicted wrongly due to this mistake. We must now learn from our mistakes and take action. We must receive better funding to help us get better material so we can detect these flaws ahead of time. We must also have better training so we won’t fall short in evidence and repeat these terrible mistakes. These are obvious problems and its controversial issues that must be corrected, perfected and

Forensic science is a broad term that refers to the use of science or technology in a court room environment. Forensic science plays an important role in modern popular culture; the police procedural is highly dependent upon cutting-edge forensic science. Moreover, many people are aware of the impact of DNA testing on the modern criminal justice landscape. However, forensic science actually predates many modern scientific advances; almost as long as there have been controversies, there has been some type of forensic science.

Forensic science borrows from a number of sciences which include: physics, Biology and chemistry. It therefore involves examination of a wide spectrum as compared to any other method of investigation. Due to the wide spectrum of investigation and evidence analysis the method offers; it ensures that the results are accurate and can be used in the court of law to make a decision. The method establishes the existence of a crime, the connection between the crimes and the

Locard’s Exchange Principles suggests that there is an exchange of particles, fibers, hairs, and other physical evidence when an individual makes contact with an individual or object (Muraskin & Roberts, 2009, p.35). This means that despite the crime a criminal will leave some trace of evidence that he or she was there and the crime scene should be controlled and examined immediately. Evidence is crucial to any investigation when a crime as occurred. The more physical evidence left at a crime scene the odds of finding their person of interest climbs significantly higher. This means the better chance for an arrest to be made and justice for the victims involved.