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CODIS Searching Criteria
When an evidence profile undergoes a traditional CODIS search, the search criteria are relaxed using something called "moderate stringency." Every laboratory strives to obtain the complete DNA profile for each sample, but sometimes samples are degraded or of insufficient quality to yield a complete profile. CODIS searches are conducted under moderate stringency to report matches between incomplete profiles. Because of this relaxed criteria, less than complete or perfect matches occur, much like the Automated Fingerprint Identification System (AFIS) produces a list of candidate fingerprint matches. These "partial matches" occur quite infrequently and do not often produce viable investigative leads.
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