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EDISCLOSUREVSDIGITALFORENSICS · A GUIDE FOR UK LAWYERS
e Disclosure or Digital Forensics? Choosing the Correct Approach
COMPUTER FORENSICS LAB
§ ABOUT THE AUTHOR
PREPARED BY COMPUTER FORENSICS LAB E-DISCOVERY TEAM
FULL CHAIN-OF-CUSTODY DOCUMENTATION
§ CONTENTS
In this guide
01 Executive summary
02 The problem in plain English: two disciplines, one costly confusion
03 The four disciplines defined: acquisition, exam in at i on, processing, review
04 Where they overlap, and where they must not be substituted
05 Why the choice matters legally
06 The decision tree: ordinary collection, forensic preservation, or investigation?
07 The ten forensic triggers
08 Practical workflow: triage at the outset, escalation mid-matter
09 Collection methods compared: cost, intrusion, evidential yield
10 Realistic litigation examples
11 Proportionality, privilege and UK GDPR when forensics enters the frame
12 Common mistakes and technical limitations
13 Questions to ask: client, opponent, provider
14 Suggested wording for instructions
15 Checklist and red flags
16 Frequently asked questions
17 Glossary · References · Disclaimer · How a specialist laboratory can assist
§ 01 · ORIENTATION
Executive summary
THE HEADLINE ANSWER, WHENDOESADISCLOSUREMATTERACTUALLYREQUIRE
FORENSIC EXAM IN AT I ON?
§ 02 · FIRST PRINCIPLES
The problem in plain English: two disciplines, one costly
confusion
§ 03 · DEFINITIONS
The four disciplines defined
1 · Forensic acquisition
2 · Forensic exam in at i on
3 · e Discovery processing
4 · Legal document review
FORENSIC EDISCOVERY
ACQUISITION PROCESSING
FORENSIC EXAM IN AT I ON LEGAL REVIEW
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§ 04 · THEJOINS
Where they overlap, and where they must not be substituted
Overlap 1 · Collection feeds both pipelines
Overlap 2 · Review surfaces forensic questions
Overlap 3 · The same providers, different hats
WHATMUSTNEVERBESUBSTITUTED
§ 05 · CONSEQUENCES
Why the choice matters legally
§ 06 · THEDECISION
The decision tree: ordinary collection, forensic preservation, or
investigation? QUESTION1
YESNO
QUESTION2
QUESTION3
QUESTION4
QUESTION5
ORDINARYCOLLECTIONBUTKEEPW AT CH
§ 07 · ESCALATIONSIGNALS
The ten forensic triggers
TRIGGER WHY FORENSICS, NOT EDISCLOSURE
1 · A document's authenticity is Authenticity lives in metadata, structure and provenance artefacts, exam in at i on
2 · Deletion is suspected or admitted Recovery from unallocated space, databases and backups, and, equally
4 · Chronology anomalies: dates that Backdating and timeline manipulation are proven or explained through file-
7 · The source is locked, encrypted, Laboratory acquisition methods (and lawful-authority questions) beyond
8 · An opponent's disclosure smells Grounds for specific disclosure, natives-with-metadata requests, or an
§ 08 · IN PRACTICE
Practical workflow: triage at the outset, escalation mid-matter
At the outset: the 48-hour triage
Mid-matter: the escalation protocol
FOR THE PRACTITIONER
STEP ACTION
3 Forensically acquire everything marked volatile, suspect or trigger-positive, before broader planning,
4 Route the remainder into documented platform collection and standard processing.
5 Record the triage in the methodology memo: source, decision, trigger(s), date, decider. This memo is
§ 09 · METHODSELECTION
Collection methods compared: cost, intrusion, evidential yield
RELATIVE
INTRUSION
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§ 10 · IN THE WILD
Realistic litigation examples
EXAMPLE1 · WHEREORDINARYCOLLECTIONWASTHERIGHTCALL
EXAMPLE2 · WHEREFORENSICSWASNEEDEDFROMDAYONE
EXAMPLE3 · THEMID - MATTERESCALATION
§ 11 · CONSTRAINTS
Proportionality, privilege and UK GDPR when forensics enters
the frame
§ 12 · WHEREITGOESWRONG
Common mistakes and technical limitations
Common mistakes
Technical limitations
§ 13 · INTERROGATORIES
Questions to ask
Ask your client
Ask your opponent
Ask a forensic / e Disclosure provider
§ 14 · DRAFTING AIDS
Suggested wording for instructions
SCOPE D FORENSIC EXAM IN AT I ON
ESCAL AT ION PA R AG RAPHFORAREVIEWPROTOCOL
§ 15 · QUICK CONTROL
Checklist and red flags
The triage checklist
Red flags: forensics is (or was) needed
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§ 16 · COMMON QUESTIONS
Frequently asked questions
When does a disclosure matter actually require forensic exam in at i on? Can we start with ordinary collection and go forensic later if something emerges? Is a forensic image always better, then? Our IT team already looked at the laptop. Is it ruined? Can we make the other side hand over their devices for imaging? Who should give the evidence, the provider who processed our disclosure?
§ 17 · REFERENCE
Glossary
Authoritative UK references
DISCLAIMER
§ HOW A SPECIALIST LABORATORY CAN ASSIST
Working with Computer Forensics Lab
35 / CrimPR Part 19, and independent-examiner appointments under privilege protocols; our e-discovery team
Speak to a forensic examiner, not a salesperson. INSTRUCTTHELAB
NEWENQUIRIESEMAILE - DISCOVERY