While wondering about solving crimes, an average person might think of processes like DNA testing or fingerprinting, but the reality is that these scientists use a wide variety of methods and technologies to get the job done. In this post, we’ll take a closer look at what tools do forensic scientists use and the basic steps in crime scene investigation. Also, you will get to know about the tools in criminal investigation and what tools does a forensic chemist use. Stay tuned!
1. What are the Basic Steps in Crime Scene Investigation?
Here are the basic steps in crime scene investigation:
- Securing Crime Scene: This is the first and most important step in crime scene investigation. All other steps flow from this one. The priority is ensuring that evidence is not disturbed or contaminated and that no one else gains access to the scene. This may require the use of physical barriers such as police tape as well as the placement of guards.
- Scanning of Crime Scene: Once the scene is secured, investigators will do a preliminary scan of the area to identify any obvious evidence or potential witnesses. This initial scan should be done as quickly as possible to avoid missing any important details.
- Sketching of Crime Scene: A sketch of the scene is essential to document the area’s layout and the evidence’s location. This can be done by hand or computer-aided design (CAD) software.
- Searching for Evidence: Once the sketch is complete, investigators will conduct a more thorough search of the crime scene, paying close attention to any areas containing evidence. This search should be done methodically to make sure that no evidence is missed.
- Documentation of Crime Scene: This step is vital to create an accurate record of the evidence. This documentation can take many forms, including photographs, video footage, and written descriptions.
- Collection and Packaging of Evidence: Once the scene has been thoroughly documented, any collected evidence must be properly packaged and labeled. This will ensure that it is not contaminated and that its chain of custody is maintained.
- Chain of Custody and Reconstruction of Crime Scene: After the evidence has been collected and packaged, it must be properly documented and tracked through the chain of custody. This will ensure that it is not lost or tampered with. Additionally, investigators may attempt to reconstruct the crime scene to piece together what happened.
2. What are the 5 Parts of Processing a Crime Scene?
Below are the parts of processing a crime scene:
- Physical evidence recognition
- Proper collection
- Scene reconstruction
3. What are the Tools in Criminal Investigation?
What tools do forensic scientists use in an investigation? The five tools in criminal investigation are:
- Forensics (e.g., fingerprinting, DNA analysis)
- Interviewing witnesses and suspects
- Gathering evidence (e.g., search warrants, subpoenas)
- Analyzing evidence
- Presenting evidence in court
4. What do Forensic Scientists use for their Work?Photo by CDC on Unsplash
What tools do forensic scientists use? The following is a list of some of the tools used by forensic scientists:
- Electron Microscopes: Forensic scientists may use electron microscopes to examine the evidence closely. These microscopes use a beam of electrons instead of light to magnify objects and can magnify objects up to 2 million times their original size.
- Lasers: Lasers are often used in crime labs to help examine the evidence. Forensic scientists may use lasers to look for bloodstains that are not visible to the naked eye or to enhance latent fingerprints.
- DNA Analysis: DNA analysis is a powerful tool that can be used in many different types of forensic investigations. DNA evidence can be used to identify a suspect, link a suspect to a crime scene, or exclude a suspect from an investigation.
- Ultraviolet and Infrared Light: Ultraviolet and infrared light can be used to examine evidence that is not visible to the naked eye. Forensic scientists may use ultraviolet light to look for bloodstains or to examine documents for hidden writing. Infrared light can be used to detect traces of body heat, which can be used to help identify the suspect.
- Advanced Analytical Chemical Techniques and Computerized Databases: Forensic scientists use various analytical chemistry techniques to examine the evidence. These techniques can be used to identify unknown substances, determine a substance’s composition, or match a sample to a known standard. Forensic scientists also use computerized databases to store and search for information on known criminals and unknown suspects.
5. What Tools do Forensic Scientists Use?
What tools does a forensic chemist use? Some of the most common tools include microscopes, DNA analyzers, and chemical reagents.
- Microscopes are used to examine physical evidence at a microscopic level. This can help identify clues such as hair follicles or clothing fibers.
- DNA analyzers can extract DNA from evidence and then compare it to DNA samples from suspects. This can help identify perpetrators or victims at a crime scene.
- Chemical reagents can be used to test for the presence of certain chemicals or drugs in evidence. This can help determine whether a suspect was involved in a crime or not.
6. What do Forensic Analysis Tools do?Image by Hands off my tags! Michael Gaida from Pixabay
As you are aware of what tools do forensic scientists use, note that forensic analysis tools allow investigators to piece together evidence from a crime scene. Forensic analysts can often determine who was involved in a crime and what happened by analyzing fingerprints, footprints, DNA, and other evidence.
Forensic analysis tools are essential for solving crimes and bringing criminals to justice. Using these tools, law enforcement officials can often build strong cases against suspects and get convictions in court. Forensic analysis is a critical part of the criminal justice system and has helped solve many heinous crimes over the years. (See What is Base Burette Laboratory Apparatus Function?)
7. What Techniques do You use to Collect Evidence?
There are five main techniques used to collect evidence in a criminal investigation:
- Search warrants
- Physical evidence
- Witness statements
8. What Tools does a Forensic Chemist use?
Additionally, what tools do forensic scientists use in their lab? Here are what tools a forensic chemist use:
- Microscopy: To examine evidence at the microscopic level, forensic chemists often use optical microscopes, scanning electron microscopes (SEMs), and transmission electron microscopes (TEMs).
- Chromatography: Chromatography is a separation technique that identifies and quantifies substances in a sample.
- Analytical Chemistry: Forensic chemists use various analytical techniques to identify unknown substances and quantify known substances. These techniques include spectroscopy, mass spectrometry, and chromatography.
9. What Tools are used to Analyze Evidence?
What tools do forensic scientists use to analyze evidence? There are five primary tools used in forensic investigations to analyze evidence:
- Visual inspection
- Mass spectrometry
10. What Tool is used to Collect Fingerprints?Photo by National Cancer Institute on Unsplash
The five fingerprints that are used in criminal investigations are collected using a tool called a fingerprint scanner. A fingerprint scanner is a device that captures an image of the ridges on the fingers. It then converts this image into a digital file that can be stored and used for identification purposes. Law enforcement agencies use fingerprint scanners worldwide to identify criminals and solve crimes. They are also used to verify the identities of people seeking access to secure areas. Check out the 15 Unique Facts About Fingerprints.