DNA Source Example: Drinking Glass
In this picture, the drinking glass contains valuable DNA evidence. Saliva, sweat and skin cells from the victim and/or the suspect may be present.
DNA Source Example: Ashtray
In this example, DNA evidence left by the suspect and/or the victim could be found in the form of saliva, skin cells and sweat on the cigarette.
DNA Source Example: Laundry
In this example, DNA evidence from both the victim and suspect can be found in the form sweat, saliva, blood and/or semen.
DNA Source Example: Baseball Bat
At first glance, the victim's DNA evidence (hair, blood and bone fragments) would be found at the tip of the baseball bat. After further consideration, DNA evidence left behind by the suspect (sweat and skin cells) could be found on the handle of the bat.
DNA evidence can be found anywhere at a crime scene. It can be used to identify both the victim and/or the perpetrator. This evidence can also be used to identify witnesses, potential suspects and accomplices.
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