- 01 Introduction
- 02 Biology of DNA
- 03 Practical Issues Specific to DNA Evidence
- 04 Introduction to the Forensic DNA Laboratory
- 05 Assuring Quality in DNA Testing
- 06 Understanding a Forensic DNA Lab Report
- 07 Statistics and Population Genetics
- 08 Mitochondrial DNA & Y-STR Analysis
- 09 Forensic DNA Databases
- 10 Collection of DNA Evidence from Suspects and Arrestees
- 11 Pretrial DNA Evidence Issues
- 12 Victim Issues
- 13 Trial Presentation
- 14 Postconviction DNA Cases
- 15 Emerging Trends
Principles of Forensic DNA
for Officers of the Court
for Officers of the Court
Module 3 :: Practical Issues
Topic 2 :: Initial Considerations in Laboratory Protocol
Probative Evidence
DNA is generally a very stable material and can remain intact for a long period of time. Thus, not every item at a crime scene should be considered probative evidence. The facts of the case along with other information will assist in making the determination of what evidence should be tested.
Example: A rape victim identifies her ex-boyfriend as the perpetrator. In this scenario, items at her place of residence where the assault occurred may have his DNA present from past consensual visits. Examination of these items would not necessarily provide useful information, yet the examination of the rape kit taken after the assault would show recent and possibly forced intercourse.
