Question

1. Explain the following:

a. State the five basic concepts of physical evidence in forensic science.

b. What challenges are presented by the processes of how physical evidence is searched, collected and preserved?

c. What are the general standards used to review the credibility of photograph evidence.

d. What problems do drugs, alcohol and crime pose to the community?

e. Explain the required steps in homicide crime scene investigation?

2. Describe the basic principles of crime-scene investigation.

3. Using a diagram:

a. Explain the Friction ridge patterns three types.

b. Describe the PEACE’ Model interview management system.

Answer 1

1. The most important kinds of physical evidence are fingerprints, tire marks, footprints, fibers , paint, and building materials . Biological evidenceincludes bloodstains and DNA.
2. When the wrongdoing scene has been completely recorded and the areas of the proof noted, at that point the gathering procedure can start. The gathering procedure will for the most part begin with the accumulation of the most delicate or most effectively lost proof. Unique thought can likewise be given to any proof or articles which should be moved. Accumulation would then be able to proceed with the wrongdoing scene trail or in some other legitimate way. Photos ought to likewise keep on being taken if the examiner is uncovering layers of proof which were not recently reported in light of the fact that they were avoided locate.

Most things of proof will be gathered in paper holders, for example, bundles, envelopes, and packs. Fluid things can be transported in non-flimsy, watertight holders. Fire related crime proof is normally gathered in impenetrable, clean metal jars. Just huge amounts of dry powder ought to be gathered and put away in plastic sacks. Damp or wet proof (blood, plants, and so forth.) from a wrongdoing scene can be gathered in plastic holders at the scene and transported back to a proof accepting zone if the capacity time in plastic is two hours or less and this is done to anticipate tainting of other proof. Once in a protected area, wet proof, regardless of whether bundled in plastic or paper, must be expelled and permitted to totally air dry. That proof would then be able to be repackaged in another, dry paper holder. By no means SHOULD EVIDENCE CONTAINING MOISTURE BE PACKAGED IN PLASTIC OR PAPER CONTAINERS FOR MORE THAN TWO HOURS. Dampness permits the development of microorganisms which can pulverize or change proof.

3. When digital imaging is considered for lawenforcement, the concern of the admissibility of digital photographic evidence in court is often raised. The fact that digital photographsare more easily altered than film-based photographs is usually cited. Some even believe digital photographs are not admissible in court.

4. Expanded wrongdoing has been appeared to dramatically affect social texture, or the relational relations between individuals from a network, since wrongdoing makes dread. The more that individuals know about wrongdoing, the more that they will in general dread getting to be casualties of wrongdoing.
With this increase in consumption not only is there an increasingly harmful effect on health but also harm more broadly within our families and communities. Alcohol consumption is directly associated with violence and aggression (including domestic abuse)
Communities rife with drug use and abuse tend to reflect the problem in negative ways. There are more drug dealers, break-ins, instances of prostitution, and other criminal behaviors that threaten the safety and security of a community.

5. - Approach the Scene
- Secure and Protect the Scene
- Initiate Preliminary Survey
- Evaluate Physical Evidence Possibilities
- Prepare a Narrative of the Scene
- Capture the Scene Photographically
- Prepare the Crime Scene Sketch
- Conduct a Detailed Search
- Record and Collect Physical Evidence
- Conduct a Final Survey
- Release the Crime Scene

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