In this area all pieces of evidence are important and so that they do not change, or get lost or become contaminated, the crime scene must be kept intact until the forensic team finishes its work. Once the area is isolated, investigators begin a detailed examination of the place, doing a techical inspection. In the first fase: 
· A documentation of the scene using photographs,videos, sketches, plans and written notes of the aspect of the scene as it was found.
· So that no detail is left unnoted the investigators search the isolated area in a spiral, box or linear fashion.
· Lastly the evidnece is numbered with a flag, jointly with a metric measurement and photographed.
Upon completing the screening, each piece of evidence is carefully collected, packaged, labeled and sent to the laboratory for an examination in depth. Hair, fiber, and body fluids that contain genetic material and volatile liquids ,being more fragile, therefore has priority. It is very important that the containers in which these are transported be completely identified with data such as date, time, the name of the victim, the location of the evidence, the type, number, the name of the person who collectd it and court case to which they belong. It is also essential that all the professionals involved or collaborated in the collection of evidence are recorded, in case any problems arise from cross contamination.
· A documentation of the scene using photographs,videos, sketches, plans and written notes of the aspect of the scene as it was found.
· So that no detail is left unnoted the investigators search the isolated area in a spiral, box or linear fashion.
· Lastly the evidnece is numbered with a flag, jointly with a metric measurement and photographed.
Upon completing the screening, each piece of evidence is carefully collected, packaged, labeled and sent to the laboratory for an examination in depth. Hair, fiber, and body fluids that contain genetic material and volatile liquids ,being more fragile, therefore has priority. It is very important that the containers in which these are transported be completely identified with data such as date, time, the name of the victim, the location of the evidence, the type, number, the name of the person who collectd it and court case to which they belong. It is also essential that all the professionals involved or collaborated in the collection of evidence are recorded, in case any problems arise from cross contamination.
When it comes to finding fingerprints, the task is a bit more complicated. To make them visible, the police applies on the surface of objects a chemist reagent, powder or spray. There are different formulas, but most of them contain resin of trementina, ferric oxide and a black pigment obtained from soot . As it is impossible to cover all of the crime scene with the product, the search for fingerprints begins in the most possible probable points of entry of the culprit and extends to the area nearest to the place where the crime was committed, on objects that the criminal may have touched (switches, arms, doors,steering wheel, safes, drawers) and that may have been left on the tips of cigarettes, chewing gum and empty packets of tobacco.
Bibliography: "A nova ciência conta o crime", Super Interessante, number 105-January 2007; pages 53 to 57.
Written by: Andreia Faria
Translated by Teresa Felgueiras
Translated by Teresa Felgueiras
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