Final answer:
A crime scene report details the collection and preservation of evidence such as fingerprints, DNA, and fibers. Special consideration is given to the methods of packaging to prevent contamination and damage.
Step-by-step explanation:
Writing a crime scene report requires meticulous attention to detail and a methodical approach to evidence preservation and collection. Additional types of physical evidence that may be encountered at a crime scene include fingerprints, DNA samples, and trace materials like fibers or hair.
The significance of these evidence types lies in their potential to uniquely identify individuals associated with the crime scene.
For preserving and collecting evidence, it is crucial to wear gloves and use appropriate tools to avoid contamination. For instance, fingerprints are lifted with fingerprint powder and tape, while DNA samples are collected using swabs and preserved in sterile containers.
Each piece of evidence must be individually packaged in a way that prevents damage or cross-contamination. Solid items are often sealed in paper bags, while fragile items may require special containers or boxes.
When packaging evidence, careful selection of materials and methods is made to ensure the integrity of the evidence from the crime scene to the laboratory.
For example, biological samples are stored in breathable containers to prevent mold growth, and sharp objects are placed in puncture-resistant containers to prevent harm and preserve the evidence's state.