Limiting Analysis to the Most Probative Evidence
It may be a waste of laboratory time and agency money to demonstrate that a suspect's DNA profile is on multiple items of evidence. Repeated unnecessary testing prevents other cases from being analyzed and increases the backlog.
For example, only in extraordinary cases would it be necessary to test the floor, bed, clothing, etc. for a suspect's semen if it was already identified on the vaginal swab taken from the victim.
If a victim's blood is found on a suspect's hand, collecting swabs of the victim's blood from additional locations could be considered unnecessary. Laboratories must also be mindful of how to prioritize the evidence they receive to avoid this kind of excessive testing.
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