This training module introduces and describes the following key concepts:
- Priority of evidence collection.
- Control/substrate samples.
- Reference samples.
- Biological evidence collection procedures.
- Specific collection procedures.
- Evidence marking.
- Chain of custody.
- Preserving evidence.
Collection and packaging methods differ depending on the type of evidence and the material upon which it is found. It is preferable to collect evidence in its original state. If the evidence is fragile or can easily be lost, the entire object should be collected and packaged when size and circumstances permit. Contact a specialist if you are not trained in the required procedure.
Standard operating procedures regarding collection and preservation of biological evidence are defined by each agency and the local forensic laboratory.
Crime scene evidence collection procedures and information to support this module are available in the accompanying document: Crime Scene Procedures III.
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