- 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 1 :: Crime Scene Issues Related to DNA Evidence
Contamination
Contamination of DNA from one source can occur when it comes into contact with DNA from another source.
Contamination can occur during collection, such as handling the evidence without wearing gloves, failing to change gloves between collecting samples, or packaging two or more items in the same collection container.
Contamination may occur in the laboratory, such as when equipment is not properly cleaned before an item is examined.
