Summary on Evidence Collection
Priority of collection is determined by environmental conditions and the nature and potential evidentiary value of the evidence. Standard or reference samples are collected for comparison purposes from individuals who may have accessed the scene. Necessary collection equipment should be preassembled in a response kit. The kit should include personal protection equipment and materials for collecting, preserving and packaging evidence.
Biological evidence requires specific handling to guard against cross- contamination from the investigator or between biological specimens. Collection procedures are determined by the situation, location and the state and type of sample.
Labels list specifics from whom and where evidence was collected and may include biohazard information. The packaging process for biological evidence includes specific precautions to prevent contamination, loss and degradation. Evidence integrity and appropriate storage conditions are critical for evidence preservation. A complete chain of custody and a detailed report are essential components of case documentation.
Courtroom testimony is a critical aspect of the investigator's duties. Correct collection procedures and accurate documentation support the investigator's ability to provide effective testimony.
Additional Online Courses
- What Every First Responding Officer Should Know About DNA Evidence
- Collecting DNA Evidence at Property Crime Scenes
- DNA – A Prosecutor’s Practice Notebook
- Crime Scene and DNA Basics
- Laboratory Safety Programs
- DNA Amplification
- Population Genetics and Statistics
- Non-STR DNA Markers: SNPs, Y-STRs, LCN and mtDNA
- Firearms Examiner Training
- Forensic DNA Education for Law Enforcement Decisionmakers
- What Every Investigator and Evidence Technician Should Know About DNA Evidence
- Principles of Forensic DNA for Officers of the Court
- Law 101: Legal Guide for the Forensic Expert
- Laboratory Orientation and Testing of Body Fluids and Tissues
- DNA Extraction and Quantitation
- STR Data Analysis and Interpretation
- Communication Skills, Report Writing, and Courtroom Testimony
- Español for Law Enforcement
- Amplified DNA Product Separation for Forensic Analysts