There are different types of the scene of the crime
A crime scene is a place of a crime, or another place where they can be found evidence of the crimeIt comprises the area in which they are recovered the majority of items found by the police (usually the police scientific) or by forensic scientists. The scene of the crime, however, may also not be the place where was committed the crime.
Here usually the contamination happens because of people
The area is generally bordered with a ribbon of signs placed along the borders of the perimeter to restrict access to only employees in the place of the crime. The crime scene can be any place, both indoors and outdoors, such as exterior, interior, and transportation.
Each type of crime scene, along with the nature of the crime committed (robbery, kidnapping, rape etc) requires investigation procedures different. The crime scenes outside are the most difficult to investigate. The exposure to natural agents such as rain, wind or heat, as well as the activity of the animals, contaminate the crime scene, and lead to the destruction of evidence. The crime scenes internal have a lot less chance of being contaminated because of the lack of exposure to the atmospheric agents.
The scene of the crime, the means of transport you have, generally, in situations of robbery or car theft.
Are taken pictures of all evidence before anything is touched, moved or analyzed.
Generally markers are numbered, are placed next to each test to allow the organization of the clues.
Make a sketch of the scene of the crime is also a form of documentation. This allows you to take notes so as to measure the distances, and other information that may not be easily inferred from a photograph. The investigators will ensure the location of the evidence and of all the other objects in the room. The the sketch is usually drawn by looking from the top, which can also be useful as all the other activities to obtain evidence. The evidence is gathered in two ways: with the analysis of the elements found in the place and with the questioning of all persons present on the spot or that they can still provide useful elements to the investigations. The tests may be of the objects and the traces left by the offender. All forensic evidence is bagged separately to avoid any contamination.
The scientific police use the various tools and techniques.
The collection of fingerprints using magnetic powder. Collect the DNA, other bodily fluids and hair for analysis in the laboratory. Impressions of shoes and tyres can be collected with the cement of the tooth. The electronics are seized to be examined by a technical expert to search for additional evidence. Also the documents are collected to be examined Ammunition and weapons are being gathered for comparison with the wounds, and for examinations, ballistic. Are taken photos of the wounds from a blunt instrument to make comparisons with any weapons used. All other evidence is collected anyway They are usually then carried out interrogations of both witnesses and of victims to know better the facts and give a chronological order to the facts.
The reconstruction of the scene of the crime is the use of scientific methods, physical evidence, deductive reasoning, and their relationship to each other to obtain a certain knowledge of the series of events that led to the consummation of the crime.
