- 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
Collection
Biological material can be collected by taking the whole item, such as a pair of blue jeans or a knife, or by taking a representative sample of the item. A representative sample can be obtained by lifting, cutting, swabbing, or scraping.
Liquid samples can be collected by soaking up the sample with cotton-tipped swabs or gauze patches or through the use of a pipette.
