- 1: Types of Evidence
- 2: Types of Crime Scenes
- 3: Evidence Collection
- Collection Priority
- Control Samples
- Reference Sample Collection
- Equipment
- Procedures
- Biological Evidence Packaging
- Blood and Body Fluid Collection
- Hair and Fiber
- Wet Stains on Absorbent Surfaces
- Special Situations
- Wet Stains on Nonabsorbent Surfaces
- Dry Stains on Absorbent Surfaces
- Dry Stains on Nonabsorbent Surfaces
- Collecting a Sample From a Smear
- Evidence Marking
- Packaging for Transport
- Chain of Custody
- Preserving Evidence
- Reporting
- Testifying
- Summary
- 04: CODIS
Chain of Custody
Home > 3. Evidence Collection > Chain of Custody
The chain of custody is a tracking record beginning with detailed scene notes
that describe where the evidence was received or collected. Collection
techniques, preservation, packaging, transportation, storage and creation
of the inventory list are all part of the process used in establishing the
chain of custody. The chain of custody is established whenever an investigator
takes custody of evidence at a crime scene. The chain is maintained when evidence
is received from another officer or detective.
A clear, well-documented chain of custody should be established through a process that includes the following:
- Taking notes, including documentation of the recovery location, the time and date recovered or received, description of the item, condition of the item and any unusual markings on or alterations to the item.
- Marking and packaging the evidence.
- Sealing the evidence.
- Preparing the chain-of-custody record.
The chain-of-custody record for all items collected from the scene must include the following:
- Unique identifier.
- Item description.
- Identity of the person who collected the item.
- Time and date of collection.
- Location where item was found.
Individuals assuming custody of the evidence from collection through analysis sign a chain-of-custody document or otherwise conduct a secure electronic transfer identifying them as contributors to the analysis of the evidentiary materials. When evidence is submitted to a property and evidence section or to a forensic laboratory, a receipt documenting the transfer is obtained.
To maintain an accurate and complete chain of custody:
- Limit the number of individuals handling evidence.
- Confirm that all names, identification numbers, and dates are listed on
the chain-of-custody documents.
- Insure that all evidence packaging is properly sealed and marked prior
to submission.
- Obtain signed or otherwise secure receipts upon transfer of evidence.
