forensic scientist tools- fingerprints kit and collecting evidence

Collecting the Evidence: The Most Common Forensic Work Tools

Work in any branch of a Forensics, when you are called to the scene, you are obliged to check all the evidence. As all occupations have their own special uniforms, clothes, and tools, all subcategories of forensics are not excluded from this category. Since Forensic jobs like Crime scene investigators, forensic engineering, forensic scientist and etc., are very sensitive, they should have special clothes and tools.

Because collecting physical evidence such as blood and hair samples as well as keeping them requires special tools. As a result, every day, the number of required tools is increased and scientists are taken to help advance these devices and equipment. For instance, if the scene is murder, the device used to collect evidence with the scene, such as rape or factory fire, is completely different.

In this paper, you will get more information about the most common forensic tools used in the crime scene.

Similar Tools

There are some items that are similar in almost all forensic jobs. When they are called to the scene, they should wear disposable gloves, protecting clothes, disposable hygiene face mask, disposable shoe covers, hair covering and safety eye wear glasses.

They also bring themselves the following tools:

  • crime scene tape
  • magnifier
  • flashlight
  • tweezers
  • swab
  • paper sacks and envelopes
  • measuring tools
  • orange evidence flags
  • adhesive lint roller
  • portable infrared, laser or ultraviolet light
  • Digital camera
  • voice recorder
  • sketchpad, logbooks, and pens

crime-scene investigators clothind wear gloves uniforms shoe cover having light

Special Tools

On the other hand, there are other special tools, are not used by all subcategories. For example, fingerprint kit is used by crime scene investigators to collect different fingerprint samples. This tool includes fluorescent powder which can demonstrate under infrared, laser or ultraviolet light. CSIs use some brushes especially ones that made of fiberglass and camel-hair to clean the surface they want to collect fingerprint sample.

Laser Trajectory

This tool can be useful in specifying the path of a bullet or other projectile. Also, it can determine the direction and angle of the source or possible bullet impact sites.

The laser caused a revolution to replace the string. The laser trajectory contains:

  • centering cone
  • laser pointer
  • penetration rods
  • tripod mount
  • Trajectory rods
  • Laser
  • Mirror
  • Protractor
  • Calculator

Laser Trajectory in crime scene forensic scene investigator tools

Forensic Lab Equipment

There is a wide range of workloads are done in the forensic laboratories including analyzing trace evidence, identifying fingerprints, DNA sample, blood, and hair sample, evaluating body fluids, analyzing drugs or perilous chemicals as well as toxic substances and more.

According to the kinds of forensic analysis that is being carried out, there are a variety of tools available. But the most common tools in a forensic lab are:

  • Laboratory Microscopes
  • Portable/ Laboratory Fume Extractor
  • GC System
  • Mass Spectrometers
microscope lab containers forensic lab

microscope lab containers forensic lab

Laboratory containers

When the scene and location of crime are announced, the process of collecting evidence can begin. The most fragile or most easily lost evidence is collected firstly. Gathering evidence is not always in one place. Gathering can also be done in different places for one crime or event. At all stages of the process, photographing is also taking place.

After collecting evidence, they must be kept on the side that will not be harmed and transferred to the laboratory safely.

Most of the evidence is gathered in paper containers such as packets, envelopes, and bags. Liquid items such as blood or drinks are poured in non-breakable, leakproof containers. Air-tight metal cans are used to keep Arson evidence.

Moist or wet evidence such as plants is kept in plastic containers. When CSI makes sure that they are in a safe place, the wet evidence, packed in plastic or paper, should be removed and let it dry completely and then put in a clean container of dry paper. Under no circumstances, the wet evidence must not keep in the plastic or paper container for more than 2 hours. Because wet evidence can lead to producing microorganisms that can spoil and change them. Any items that may be connected to each other should be packaged separately. Containers must be closed and prevented from mixing evidence during transportation to labs.


Collecting Types of Evidence

  • Fingerprints and also palm prints and bare footprints

One of the most important evidence in the crime scene is the fingerprint, which requires a suspect’s fingerprint as well as fingerprints removed from the victim for comparison.

fingerprints kit and tools

  • Injury and bruising marks

Injury and bruising or biting marks are found many times in sexual assaults. These signs are always taken photos at different angles and conditions. The number of photographs, the better the result. Some of the older Injury and bruising or biting marks are no longer visible on the skin can sometimes be visualized and photographed using UV light and intermittent light sources.

  • Broken fingernails

A broken fingernail collected at a crime scene can be for the person who has been present in that area several months ago before committing a crime. Broken nails should be placed in a paper packet and then in a paper envelope.

  • Handwriting

Finding specific manuscripts can be collected and reviewed and processed for fingerprints. They should be gathered in paper containers.


  • Blood and body fluids

Moist or wet evidence such as Blood and body fluids are kept in plastic containers for 2 hours.

  • Firearm and tool mark evidence

Bullets and casings explored at the crime scene may belong to a suspected gun or they were sent to the lab to identify the gun model. Note that firearms should be safe before posting to a crime lab. The firearm must be collected in an envelope or paper bag. The ammunition and magazine should be gathered in a separate envelope or paper bag.

Casings and bullets are collected in paper envelopes or small cardboard pillboxes. If any sharp objects such as knife found, the blade and point must be kept in unmovable cardboard and put in a paper bag or envelope.

  • Shoe prints and tires

Shoe prints and tires of the suspect can be reviewed to know what type of shoes or tires to search according to suspect’s residence or vehicles.

  • Hair

Hair at the scene can be collected in a paper packet and then put in an envelope.

  • Fibers

Fibers can be gathered in a paper packet and put in an envelope.

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