Redacted Criminal Defense Forensics Case Study: Device Seizure, SHA-256 Imaging, and Daubert Qualification in a Kentucky Trafficking Matter.

The exemplar underlying this redacted writeup is a Kentucky trafficking / drug-possession matter — court, jurisdiction, custodian, and counsel redacted — in which the Commonwealth's case rested in significant part on digital evidence drawn from a client-owned smartphone seized at the time of arrest. The defense team retained a credentialed Rule 702 expert after the prosecution's chemical-analysis timeline left digital timestamps as the strongest prosecution exhibit on the contested date. No identifying fact about the client, the jurisdiction, the court, the prosecutor, the custodian, or defense counsel is disclosed here. The methodology and exhibits described below reflect commonly accepted practice in Kentucky criminal-defense engagements and the categories of forensic output produced under those practices, not a literal retelling of any specific client file.

The six steps below are the standard criminal-defense forensics chain for any Kentucky trafficking / drug matter in which seized-device evidence is contested under KRE 901 or challenged on Daubert grounds. Each step produces a documented examiner artifact that travels with the case through authentication and Rule 702 expert qualification.

• Chain of custody documentation beginning at the moment of device seizure — written chain with date, actor, location, and SHA-256 verification hash on every transfer, producing a paper trail that survives a Franks v. Delaware challenge to authenticity and a Daubert challenge to integrity.
• Device seizure and on-scene triage — preserved original state with RF shielding in Faraday bags at the point of seizure, kept the device powered or powered-down per documented protocol, and recorded the seizure log in a form acceptable to opposing counsel and the trial court.
• Forensic imaging with SHA-256 verification — bit-for-bit (forensic) image captured through a write-blocked EnCase / Cellebrite workflow, with the hash value logged the moment the image is created and re-run at every subsequent transfer so any tampering is detectable downstream.
• Native-data examination of the seized devices — recovered relevant application databases, message stores, and timeline artifacts in a form correlating user activity with the dates and times alleged in the criminal filing, capturing the operative window of presence for the contested conduct.
• Correlation of device-side timeline with any available carrier GPS, court-authorized pen-register order, or cloud-side data returned through legitimate process — producing a unified, examiner-attested local-time timeline that the court can read on its face without parsing UTC offsets or analyst conventions.
• Preparation of a Rule 702 / Daubert-qualified expert report with a methodology appendix and the exhibits cataloged in adversarial-ready form — credential-based admissibility, the peer-reviewed methodology appendix, and the known-error-rate citation pattern that together carry the report into a Kentucky courtroom under KRE 702.

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A Kentucky criminal-defense engagement of this type typically produces a six-exhibit record that travels together into the courtroom. The categories described here are what an opposing counsel can expect to see when the case moves past preliminary hearing. Exhibit A is the seizure and chain-of-custody log, captured at the point of seizure and continued forward through every transfer with date, actor, location, and SHA-256 verification hash — the paper trail that anchors KRE 901 authentication of every downstream exhibit. Exhibit B is the forensically sound device image, captured through write-blocked acquisition using the EnCase / Cellebrite toolchain, with its companion SHA-256 hash verification report generated at the moment of acquisition and re-run at every transfer. Exhibit C is the native-app and message-store extracts, showing the timestamps and session metadata stripped of personal identifiers, in a form suitable for filing and review. Exhibit D is the unified, examiner-attested local-time timeline correlating device-side activity with any available carrier GPS or court-authorized pen-register data. Exhibit E is the expert methodology exhibit, documenting the write-blocked acquisition, the chain-of-custody handoff log, the examiner credentials (GCFE / GCFA / EnCE / CCPA), and the peer-reviewed methodology citation pattern that support Rule 702 / Daubert qualification. Exhibit F is the Rule 702 expert report and methodology appendix itself — the deliverable that ties the preceding exhibits together into a single expert opinion admissible under KRE 702. The exhibit references here are descriptions of categories of output, not particular exhibits taken from a real client file.

In the underlying exemplar, the unified local-time timeline contradicted the Commonwealth's attributed timeline on the contested transaction, and the defense moved to challenge the digital-evidence chain on authentication grounds at preliminary hearing. The expert report was admitted under KRE 702 as the testimony of a qualified expert, and the underlying device-image exhibits were authenticated through the documentation chain built under KRE 901. No Daubert challenge to the methodology or to the known-error-rate citation pattern was sustained. The point of this writeup is not the outcome of that exemplar — it is to document, for an attorney considering a criminal-defense engagement, the categories of forensic work that produce an adversarial-ready result under Kentucky Rules of Evidence and the rule framework that carries those exhibits into a Kentucky courtroom. An attorney evaluating a live case should treat this writeup as a description of workflow categories, not as a substitute for a case-specific consultation.