The colors in the scene,the distances of all objects from two points, and the position of all law enforcement officials at the time. Basically every single detail they see infront of them. :)
Crime scene diagrams are typically done as soon as possible after a crime has been discovered. They serve the purpose of visually documenting the layout and physical details of the scene, which can be useful for investigators, prosecutors, and jury members in understanding the circumstances of the crime. Crime scene diagrams also help preserve the evidence and provide an accurate record for future reference.
Crime scene investigators at a crime scene have numerous responsibilities. They:Rope off (crime scene tape) the crime scene and protect the areaNotice and mark evidence with tags (numbered triangles that sit on the ground next to an item)Photograph the crime scene and evidence without touching itMake preliminary tests, such as whether a reddened fluid is/is not bloodDraw maps / sketches of evidence and where it was found, with measurements, like "3 inches from the person's right arm and 5 feet from the only 7-foot tall pine tree in the side yard"Log the evidence (done along with #6)Collect the evidence using proper techniques and seal itTransport the evidence to the lab; protect it; test it; write, photograph and and record resultswork with police and coroner throughout
Rough sketch
It is unknown because they tend to work till they are done with a case or presentation.
Forensic scientists test blood at a crime scene using the chemicals Luminol (C8H7N3O2) and hydrogen Peroxide (H2O2). if blood is present when they use these chemicals, it will glow with a bluish color in the dark. I hope this helps.
A crime
Crime scene diagrams are typically done as soon as possible after a crime has been discovered. They serve the purpose of visually documenting the layout and physical details of the scene, which can be useful for investigators, prosecutors, and jury members in understanding the circumstances of the crime. Crime scene diagrams also help preserve the evidence and provide an accurate record for future reference.
Crime scene investigators at a crime scene have numerous responsibilities. They:Rope off (crime scene tape) the crime scene and protect the areaNotice and mark evidence with tags (numbered triangles that sit on the ground next to an item)Photograph the crime scene and evidence without touching itMake preliminary tests, such as whether a reddened fluid is/is not bloodDraw maps / sketches of evidence and where it was found, with measurements, like "3 inches from the person's right arm and 5 feet from the only 7-foot tall pine tree in the side yard"Log the evidence (done along with #6)Collect the evidence using proper techniques and seal itTransport the evidence to the lab; protect it; test it; write, photograph and and record resultswork with police and coroner throughout
Make sure you clean up
Rough sketch
Although much of the work of a ballistic expert is done in the lab, there are other issues besides bullet comparision. At a crime scene trajectory angles ect. are studied and documented. This type of evidence is usually vital to a murder investigation and it cannot be done in well without the actual crime scene.
It is unknown because they tend to work till they are done with a case or presentation.
It is unknown because they tend to work till they are done with a case or presentation.
If done correctly, and enough rope or tape is available one time is enough. Anyone other than an authorized official who crosses that line is liable to arrest.
Forensic scientists test blood at a crime scene using the chemicals Luminol (C8H7N3O2) and hydrogen Peroxide (H2O2). if blood is present when they use these chemicals, it will glow with a bluish color in the dark. I hope this helps.
The investigators used to do it as a marker. They no longer do it because it contaminates the crime scene. In the movies it adds a dramatic effect therefore it is only done in movies.
they collect thing like fingerprints, DNA samples (from blood, cigarette butts. etc.) fibres, and weapons that may have been used, clothes, everything that may have been involved in the crime or has blood on.