An investigative concept defining processes used to identify facts, preserve information, and support lawful adjudication outcomes. It governs planning, collection, documentation, and verification of information through structured investigative steps and records. It does not justify unlawful collection methods and requires integrity controls to prevent contamination, loss, or misattribution. It materially affects case solvability and prosecutorial viability by shaping reliability and completeness of the record. The concept is generally stable, though methods and technical standards evolve with forensic and digital capabilities over time.

Principle

Preserve integrity, authenticity and context through validated collection methods, hashing, secure storage, and comprehensive documentation so that original meanings and relationships remain reproducible and defensible.

Demonstration

A forensic investigator uses a write-blocker to image a suspect hard drive, calculates cryptographic hashes of the image and key files, extracts email headers and browser history with timestamps and correlates them to network logs to establish a timeline.

Misapplication

Treating screenshots or printed copies without provenance as equivalent to original artifacts, altering timestamps during conversion, or failing to preserve metadata and contextual logs that are necessary to interpret the data.

Consequence

When handled correctly, digital evidence can establish timelines, link actors to actions, corroborate statements, and be reanalyzed independently by other experts due to intact provenance and reproducible methods.

Reversal

If digital items are treated as generic information without preserving technical properties or provenance, critical attributes (timestamps, metadata, hash integrity) can be lost, leading to misinterpretation or exclusion from proceedings.

Boundary

Includes electronically stored information that has potential probative value; excludes purely derivative summaries without documented mapping to originals, non-digital hearsay, or material whose provenance cannot be established.

Semantic Tension

There is tension between 'digital data' as neutral information and 'digital evidence' as data with demonstrated probative value; classification depends on context, relevance and documented provenance.

Synthesis

Digital Evidence comprises electronic artifacts with probative potential whose value depends on preservation of technical properties, context and traceable provenance so they remain reproducible and admissible.