Table of Contents
- 1 What device might be used at the crime scene?
- 2 Is gasoline An example of an accelerant?
- 3 What tools are needed for physical evidence?
- 4 What are the 7 basic steps in crime scene investigation?
- 5 What is considered an accidental fire?
- 6 What are the dangers of fire and arson?
- 7 What should an investigator do at a fire scene?
What device might be used at the crime scene?
Scales and measuring devices are frequently used in crime scene and evidence photographs.
What should be done at a crime scene?
7 Steps of a Crime Scene Investigation
- Identify Scene Dimensions. Locate the focal point of the scene.
- Establish Security. Tape around the perimeter.
- Create a Plan & Communicate. Determine the type of crime that occurred.
- Conduct Primary Survey.
- Document and Process Scene.
- Conduct Secondary Survey.
- Record and Preserve Evidence.
Is gasoline An example of an accelerant?
Gasoline is the most commonly identified ignitable liquid accelerant reported by American forensic laboratories. Its principal use is as a fuel in spark ignited, internal combustion engines.
What problems do arson investigators face at a fire scene?
Evidence of arson is nearly impossible to preserve. Not only will the fire likely destroy physical proof but the water and chemical foam used to put out the blaze can also destroy potential evidence. Because of this, an arson investigator’s most important witnesses are the firefighters that first arrive on the scene.
What tools are needed for physical evidence?
A trace evidence collection kit might include:
- Acetate sheet protectors.
- Bindle paper.
- Clear tape/adhesive lift.
- Electrostatic dust lifter.
- Flashlight (oblique lighting).
- Glass vials.
- Slides and slide mailers.
What are the 5 steps in a crime scene investigation?
The basic crime scene procedures are physical evidence recognition, documentation, proper collection, packaging, preser- vation, and, finally, scene reconstruction.
What are the 7 basic steps in crime scene investigation?
7 Steps of CSI:
- Secure the Scene.
- Separate the Witnesses.
- Scan the Scene.
- Photograph the Evidence.
- Sketch the Scene.
- Search the Scene.
- Secure and Collect Evidence.
What is the best fire accelerator?
Acetone is a common accelerant used in arson-related fires, though it is so common, it can also serve as an accelerant in an accidental fire. Acetone is one of the primary ingredients in nail polish remover; a common household product. Acetone has an ignition temperature of 869 degrees F.
What is considered an accidental fire?
Accidental fires involve all those for which the proven cause does not involve a deliberate human act to ignite or spread fire into an area where the fire should not be. For example, in a legal setting, a trash fire might be spread by a sudden gust of wind.
What to look for in an arson case?
Evidence of crimes in addition to the possible arson (e.g., weapons, bodies, drugs and/or clandestine drug laboratory equipment). Witnesses, bystanders and victims. Any other unusual items or the absence of normal contents or structural components. Fire-suppression activities that may wash away or dilute potential evidence.
What are the dangers of fire and arson?
DANGER:Beware of incendiary or explosive devices! The scene may contain devices specifically designed to kill or maim public safety responders. Do not touch any suspected incendiary or explosive device. Evacuate the area, and request the services of personnel trained in the removal of such items.
What do you need for a crime scene?
Biohazard bags. Bodily fluid collection kit (sterile swabs, distilled water, — optional presumptive tests, and sterile packaging that allows the swabs to air dry). Camera (plus memory cards, back up battery, remote flash, tripod and remote cord). Evidence seals/tape. Flashlight (s) with extra batteries. Footwear casting materials.
What should an investigator do at a fire scene?
At the time the scene is determined to involve an arson or other crime, the investigator must address legal requirements for scene access, search and evidence seizure. Contact first responders and establish presence. Define the scene’s boundaries. Identify and interview witnesses at the scene.