Forensic Science

CSI can use DNA samples to link a suspect to a crime scene or victim. By analyzing the unique DNA profile from a sample, investigators can identify individuals with a high degree of accuracy. This helps in solving crimes and providing evidence for prosecution.

A photographer should follow crime scene protocol, which includes not tampering with the body or surroundings. They should document the scene as it is and inform the authorities immediately. It is important to respect the deceased and the integrity of the investigation.

The rate at which the body's temperature drops after death can vary widely depending on factors such as the ambient temperature, clothing, and body size. Typically, the body's temperature can drop by around 1.5 degrees Fahrenheit per hour in the first 12 hours after death.

The greatest challenge to forensic science isn't any one drug, but a combination of drugs and chemicals and their complex reactions. The longer the drug remains in the body, the more it is metabolized into another substance.

Microscopes play a critical role in forensic chemistry by allowing analysts to examine trace evidence such as fibers, hairs, and glass fragments. This level of detail can provide crucial information for identifying suspects, linking evidence to crime scenes, and ultimately solving cases. The use of microscopes helps in the accurate analysis and interpretation of evidence, leading to more reliable forensic conclusions.

Fingerprints are made visible by the natural oils and sweat present on the ridges of the skin. When a person touches a surface, these oils and sweat are transferred, leaving a print that can be developed using techniques such as dusting, chemical processing, or photography.

Investigators can use the angle of impact of blood spatter to help determine the direction from which the blood originated. By analyzing the angle, they can reconstruct the events that led to the blood spatter, helping to establish the position and movement of individuals involved in the crime. This information can provide crucial evidence to support or challenge witness statements and suspects' alibis.

A group of associated fields is called a record. Each field within the record stores specific information related to a single entity or object. Together, the fields form a cohesive set of data that represents a complete unit of information.

1. Take a jar and fill it up with the blood.

2. Tell everyone you committed the crime.

3. Show the police.

4. Hide the body in your neighbors trashcan.

5. Wate until the trash truck comes.

6. Then you will feel guilty.

The lab will compare markings on the bullet with test fires from the suspect weapon. They use a comparison microscope to analyze striations and grooves left on the bullet. If there's a match in these markings, it suggests the bullet came from the suspect weapon.

Atomic absorption is used in forensics to analyze trace elements in samples such as blood, hair, or soil. By measuring the absorption of specific wavelengths of light by the atoms in the sample, atomic absorption spectroscopy can determine the presence and concentration of elements like arsenic, lead, or mercury, which can be crucial in solving criminal cases.

Evidence of a gunshot wound includes a wound with an entry and exit point, damage to surrounding tissue, blood loss, and potential presence of gunpowder residue. X-rays may also reveal the presence of bullet fragments. An autopsy may provide further details on the trajectory of the bullet and internal damage caused.

Forensic Science is the application of scientific methods and techniques to analyze and interpret physical evidence in criminal investigations. It involves using scientific principles to solve crimes and provide evidence for legal proceedings.

To become a forensic chemist, it is recommended to take courses in chemistry, biology, mathematics, and forensic science. These classes will provide a solid foundation in scientific principles, laboratory techniques, and understanding of forensic analysis. Some specialized courses in areas like toxicology or trace evidence analysis may also be beneficial.

It works similar to how a photocopier scans a document. The reader uses a laser to scan a person's finger. It then compares the scan with a database of prints already stored on the computer. If the print matches - it allows access, if not - it rejects the potential user.

Pigment granules, which determine hair color, are found in the cortex layer of the hair shaft. They are produced by cells called melanocytes and are responsible for producing melanin, which gives hair its color.

Forensic science utilizes various chemical processes such as chromatography, spectroscopy, and polymerase chain reaction (PCR) for analyzing evidence like drugs, toxins, and DNA. These techniques help in identifying substances, determining their composition, and linking them to a particular individual or source. Additionally, chemical processes are crucial for detecting trace evidence and examining physical properties of materials.

A few of the fields of forensic science are

Ballistics- anything using explosives or weapons

Botany- study of plants

Anthropology- bones

Facial reconstruction- self explanatory

Forensic evidence is typically placed in paper bags instead of plastics because paper allows evidence to breathe, preventing the growth of mold or bacteria. Plastic can trap moisture, potentially compromising the evidence. Additionally, paper bags provide a suitable environment for any trace amounts of chemicals to evaporate.

The two main types of DNA testing are PCR (polymerase chain reaction) and STR (short tandem repeat) analysis. PCR is used to amplify specific regions of DNA for analysis, while STR analysis examines short repeated sequences in DNA to create a genetic profile.

Physical evidence at a crime scene is collected using techniques like photography, sketching, and proper packaging to prevent contamination. It is essential to document the item's location, take measurements, and use protective gear to avoid compromising the evidence. Chain of custody procedures must be followed to ensure the integrity of the evidence for court presentation.

The term used in forensics to describe a sample of unknown origin is "questioned sample."

The time it takes to analyze evidence in a forensic lab can vary depending on the complexity of the case, the type of evidence, and the workload of the lab. It can range from a few days to several months. Laboratories prioritize cases based on urgency and type of crime.

Potassium cyanide is not used in the cremation process. Any trace amounts of cyanide found in cremated remains would likely come from environmental exposure prior to cremation, rather than being a byproduct of the cremation process itself.

The criminal justice system in Kenya faces challenges such as corruption, inadequate resources, backlogs in the courts leading to delays in delivering justice, and lack of effective coordination between different agencies involved in law enforcement and prosecution. These challenges contribute to a lack of public trust in the system and hinder its ability to effectively address crime and uphold the rule of law.