Special attention must be paid to items that will be processed for latent fingerprints. These must be packaged and handled in a way that prevents the deposit of additional latent fingerprints or smearing of latent evidence prints before visualization.
When latent prints or palm prints, etc., are present, they may be examined for the presence of touch DNA. The destructive nature of certain processing techniques needs to be considered before a decision can be made as to whether to swab for DNA or collect the latent print. The quantity and quality of other sources of DNA evidence that may also be present at the scene should be considered in a discussion with the investigator or laboratory personnel.
In addition, there are some cases where discussion with laboratory personnel is advised to determine the sequence of examinations. For example, an aluminum can may be submitted to the laboratory with a request for latent fingerprint and DNA analysis. Some latent print visualization and processing techniques can cause loss or damage to DNA evidence. In the reverse, the DNA analysis process may eliminate latent fingerprint evidence.
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