criminalistics
1. Examine the various search patterns investigators can use to systematically search crime scenes for evidence. Line/strip search-method used by one or two investigators who walk in straight lines across the crime scene. This method is best used in scenes where the boundaries are well established.
Grid search-method employed by two people who perform overlapping line searches forming a grid. This method is very thorough.
Spiral search-employs one person where the investigator moves either in an inward spiral from the center to the boundary. This method is helpful because the searcher is moving from an area light with evidence to an area where more evidence is most likely to be found. Because the searcher may not be able to complete a perfect spiral evidence could be missed.
2. What is the difference between a primary and a secondary scene? Preliminary scenes are where a crime actually took place (rape, burglary, murder...)
Secondary scenes are where other pieces of evidence, in connection to the preliminary scene, can be found (subject's domicile, an alleyway down the street, ect..)
3. List the three methods for crime scene recording. Notes, photography, and sketching
Notes-the notes should start by identifying the person who contacted the investigator, the time of the contact, and all preliminary information enclosed, including the case number.
Photography-crime scene photographs can show the layout of the scene, the position of evidence to be collected, and the relation of objects at the scene to one another.
4. What are aperture and f-number? How does the aperture relate to the f-number and how does this affect the amount of light to which the film is exposed?
5. What is depth of field? How does a camera the f-number related to a depth of field of the photos it produces?
6. What should medium-range photos taken at the crime scene show? What should appear in every medium-range photo and why?
Grid search-method employed by two people who perform overlapping line searches forming a grid. This method is very thorough.
Spiral search-employs one person where the investigator moves either in an inward spiral from the center to the boundary. This method is helpful because the searcher is moving from an area light with evidence to an area where more evidence is most likely to be found. Because the searcher may not be able to complete a perfect spiral evidence could be missed.
2. What is the difference between a primary and a secondary scene? Preliminary scenes are where a crime actually took place (rape, burglary, murder...)
Secondary scenes are where other pieces of evidence, in connection to the preliminary scene, can be found (subject's domicile, an alleyway down the street, ect..)
3. List the three methods for crime scene recording. Notes, photography, and sketching
Notes-the notes should start by identifying the person who contacted the investigator, the time of the contact, and all preliminary information enclosed, including the case number.
Photography-crime scene photographs can show the layout of the scene, the position of evidence to be collected, and the relation of objects at the scene to one another.
4. What are aperture and f-number? How does the aperture relate to the f-number and how does this affect the amount of light to which the film is exposed?
5. What is depth of field? How does a camera the f-number related to a depth of field of the photos it produces?
6. What should medium-range photos taken at the crime scene show? What should appear in every medium-range photo and why?