- Unsolved case
- No new leads
- Viable leads have been worked without resolution
- The case is no longer being actively investigated
- Evidence from an unsolved case matches an offender, evidence from another unsolved crime or evidence from another crime with a suspect
- This can come from cases being actively investigated where the hit reveals a relationship between the cases not known before, or it may come from a case under current investigation and an old case (cold case) that is no longer being investigated.
Cold Hits Defined5
A DNA cold hit refers to an instance where one or more connections are made between the person who committed the crime and a crime scene in the absence of a current investigative lead. Crime laboratories receive notification of these cold hits, and after a confirmation process the investigator is notified. The ability to manage and follow up on a cold hit has become a major concern for law enforcement leaders.
It is ultimately the responsibility of the law enforcement agency that has the investigative jurisdiction of the cold case to resolve these hits.
The most important thing to do at this stage is to determine the probative value of the hit.
5 training.nij.gov definition of cold hit: "When CODIS recognizes a match between an offender and forensic profile, it is referred to as a 'cold hit.' "
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