Wait a second!
More handpicked essays just for you.
More handpicked essays just for you.
Essay on crime investigation process
Principles of criminal investigation
Crime scene investigation process
Don’t take our word for it - see why 10 million students trust us with their essay needs.
On May 22, 2005, the body of Sara Lynn Wineski, a homeless women, was found underneath a deck at the Ronald McDonald House in St. Petersburg. She was forty-nine years old and appeared to be strangled and raped to death. A resident told authorities that they heard screams around 11 p.m. the night before they found her body. DNA evidence was collected that night and years later, police were able to match the DNA from the scene to Raymond Samuels. Testing confirmed that it was Samuels’ DNA that was collected from the scene and also his DNA was found on the belt used to strangle Wineski. By the time they discovered it was Samuels’ DNA, he was already in prison in Ohio, for robbing and attacking an elderly couple. He was sentenced twenty-nine years.
Police officer, Mike Kovacsev said “There were no witnesses so we had to let the forensic evidence speak for itself”. Through DNA testing, authorities were able to match the DNA discovered on the scene to Raymond Samuels. This pertains to forensic because it show how DNA helped solve the murder of Sara Lynn Wineski.
On June 19th of 1990, Robert Baltovich’s girlfriend Elizabeth Bain went missing. Elizabeth told her family that she was going to check the tennis schedules at her school, the University of Toronto Scarborough Campus. She never returned, but her car was eventually recovered. It was found with blood on the backseat, with forensic tests showing that it was Elizabeth’s. With no clear evidence, the “solving” of the case was completely based on eyewitness testimonies, which eventually had Robert arrested for the murder of his girlfriend.
According to the Innocence Project (2006), “On September 17, 2001, Chad wrote the Innocence Project in New York, which, in 2003, enlisted pro bono counsel from Holland & Knight to file a motion for DNA testing on Tina’s fingernail scrapings.” The state had tested the DNA that was under Tina’s nail from the first case but at that time it was inadequate and could not be tested. It was not until now that we have the technology capable enough to test it. In June 2004, the test came back negative to matching both Jeremey and Chain Heins but did come from an unknown male. The state argued that it was not enough to overturn the conviction so Chad’s attorney asked the state to do some further testing and to compare the DNA from under the fingernails to the hairs that was found on Tina’s body. It was in 2005 that the Florida Department of Law Enforcement confirmed that there was a match between the DNA under Tina’s nail and the pubic hair. According to LaForgia (2006), “this particular type of DNA, the report stated, was found in only about 8 percent of Caucasian American men.” During this process there was a new piece of evidence that Chad’s attorney had learned about during the appeals process, a fingerprint. There were some accusations that the prosecutors never disclosed this information about this third fingerprint and if they did it was too late. The jurors did not even know about this fingerprint and if they did this could have changed the whole case. This fingerprint was found on several objects that included the smoke detector, a piece of glass, and the bathroom sink. It was soon discovered that this fingerprint matched with the DNA found on the bedsheets that Tina was on. This was finally enough evidence to help Chad Heins become exonerated in
A horrific murder happened in tiny Skidmore on December of 2004. Lisa Montgomery and Bobbi Jo Stinnett met and found out that they had much in common and became good friends (Nunes 85-86). Surprisingly, Bobbi and Lisa met in an internet chat room. Bobbi was into puppy breeding and she occasionally served as a judge. Lisa lived in Kansas where her close friends were shocked about what she was talking about. Of course, Lisa shrugged it off and she sent an email to Bobbi saying that she wanted to see the puppies (Nunes 85-86). When Lisa met Bobbi Jo she had a fake name which was Darlene Fisher because she didn’t want Bobbi to know her real identity. When Lisa sent Bobbi the email she had a criminal intent on her mind. She was planning to choke Bobbi into unconsciousness and then cut open her womb and steal Bobbi’s unborn baby. When Lisa arrived at the house she threw a rope around Bobbi’s neck and choked her until she was unconscious. That is when Lisa took a knife and started to cut open Bobbi’s stomach. Lisa had to cut through skin, fat, and muscle to get to Bobbi’s uterus. Bobbi’s baby was in eight-month gestation; Lisa cut and tied the baby’s cord. Lisa stole the baby and fled to her house in Kansas. Unfort...
This case started on July 25, 1984, with the death of a nine year old girl by the name of Dawn Hamilton. The story plays out as follows: Dawn approached two boys and an adult male that were fishing at a pond in a wooded area near Golden Ring Mall in eastern Baltimore, Maryland. Dawn asked the boys to help her find her cousin, they declined the adult male however agreed to help her look. This was the last time anyone saw Hamilton alive. Hamilton’s body was found to have been raped, strangled and beaten with a rock. The police collected a boot print at the scene and DNA that was found in Hamilton’s underwear. The police also relied on the witness testimonies and line-ups, which in this case was the photo array. With the five eye witness testimonies and a tip the believed to be suspect was found. Kirk Noble Bloodsworth a prior U.S. Marine with no prior criminal record was taken into custody and charged with intentional first degree murder, sexual assault and rape. Bloodsworth was basically convicted on the eye witness testimonies. The state requested the death penalty. Bloodsworth was sentenced to two consecutive life terms. (BLOODSWORTH v. STATE, 1988)
In July of 1994, a little girl named, Megan Kanka, was raped and strangled. They found her body near her home in Hamilton Township, New Jersey. The story of thing young girl has shocked the nation. The man responsible for this brutal act is named, Jesse Timmendequas. He had been convicted twice prior to this attack.
found behind the guest house was proven by DNA testing to have O.J.'s blood and
Kevin, Johnson. “DNA clears Ramsey family in JonBenet’s death.” USA Today n.d.: MAS Ultra-School Edition. Web. 20. Feb. 2014.
“DNA Testing and the Death Penalty.” ACLU: American Civil Liberties Union. 3 Oct. 2011. Web. 22 April 2014.
In 1989 the National Research Council Committee on DNA Technology in Forensic Science was developed due to numerous scientific and legal issues (The Evaluation of Forensic DNA Evidence). The National Research Council’s key role was to analyze statistical and population genetic issues in the use of DNA evidence and review major alternative approaches to statistical evaluation of DNA evidence (The Evaluation of Forensic DNA, 50). Over the past fifteen years DNA profiling has made tremendous advancements and continuous improvements in the fight against violent
Katherine Stang presented her thesis titled, Issues in Forensic Identification and the Use of Single Nucleotide Polymorphisms (SNPs). Short Tandem Repeat (STR) technology is a forensic analysis that looks at specific regions or loci found on nuclear DNA. There are 13 core loci that the FBI uses as a standard for the Combined DNA Index System (CODIS). More recently single nucleotide polymorphisms (SNPs) have gotten a lot of attention for its use in forensic DNA testing. A SNP array is variation at a single site in DNA and is the most abundant variation in the human genome with over four million identified in the human genome. Some of the advantages of SNP are their high occurrence in the genome, use in lineage testing due to low mutation rates, and their use in degraded samples by using short amplicons. Ms. Stang presented the following case study as an example of the use of SNPs in degraded DNA samples: a charred femur bone badly degraded by time and environmental conditions was found and though STR failed to type the sample, SNP was successful. Ms. Stang said that further work is needed in the area of SNPs and should include an agreement on how SNPs should be used in forensic labs, additional studies to determine optimal procedures, and research into the area of sexual assault evidence.
The collection of DNA in an investigation is used most often to determine who the perpetrator(s) might be in a crime. There has been a rapid growth since its inception and legal and ethical issues have arisen. In the Double –Helix Double-Edged ...
Before the 1980s, courts relied on testimony and eyewitness accounts as a main source of evidence. Notoriously unreliable, these techniques have since faded away to the stunning reliability of DNA forensics. In 1984, British geneticist Alec Jeffreys of the University of Leicester discovered an interesting new marker in the human genome. Most DNA information is the same in every human, but the junk code between genes is unique to every person. Junk DNA used for investigative purposes can be found in blood, saliva, perspiration, sexual fluid, skin tissue, bone marrow, dental pulp, and hair follicles (Butler, 2011). By analyzing this junk code, Jeffreys found certain sequences of 10 to 100 base pairs repeated multiple times. These tandem repeats are also the same for all people, but the number of repetitions is highly variable. Before this discovery, a drop of blood at a crime scene could only reveal a person’s blood type, plus a few proteins unique to certain people. Now DNA forensics can expose a person’s gender, race, susceptibility to diseases, and even propensity for high aggression or drug abuse (Butler, 2011). More importantly, the certainty of DNA evidence is extremely powerful in court. Astounded at this technology’s almost perfect accuracy, the FBI changed the name of its Serology Unit to the DNA Analysis Unit in 1988 when they began accepting requests for DNA comparisons (Using DNA to Solve Crimes, 2014).
...case is based only on this piece of evidence that has the possibility of a lab mistake, the chance of an error should be taken into account. It should also be recognized because the simple solution to wrong convictions based on one piece of possibly inaccurate evidence is to stop making convictions based only on DNA evidence. As stated by Judge Andrew Haesler, “As judges, lawyers, experts and potential jurors, we want evidence and results that make our already difficult jobs easier. We would love so expert to ease the burden of our judgement by saying, ‘This is the answer.’” (Haesler 9). However, as DNA technology stands today, it is not perfect, nor will it ever be. DNA evidence can never be a certain way to convict a suspect, it can only be used as support to convict a suspect along with other relevant evidence. DNA evidence alone does not suffice for conviction.
A 15 year old girl name Lynda Mann was abducted in Narborough, England. The following day, the police found her body, and learned that she was raped and murdered. Three years later, another young woman had the same thing done to her just like Lynda Mann; she was abducted, raped and murdered. A man named Richard Buckland confessed to the second murder. A DNA analyst performed a method known as genetic fingerprinting. Through this, there was no match to the murder. This meant that Buckland was not guilty of the crime he confessed to.
From Lydia’s case, we can see the science such as DNA testing can prove the true in a court, and it is enough to be evidence which would let people die.