ChatGPT Prompts for Criminal Defense Lawyers: Case Prep, Motions, Trial Strategy

Published: July 2026 | 8 min read

Criminal defense lawyers handle some of the highest-stakes legal work. They analyze evidence, draft motions, prepare witnesses, negotiate pleas, and try cases — all while protecting constitutional rights and managing intense client pressure. AI can help organize case analysis, structure motions, and prepare trial materials, but only with prompts that understand criminal defense practice.

These prompts are adapted from Skillent's Legal AI Prompt Library.

Case Analysis & Strategy

1. Case Theory Development

Role: Criminal defense attorney
Task: Develop case theory for [charge] against [client description]
Input:
- Charges: [list with statutes]
- Evidence: [police report summary, witness statements, physical evidence]
- Client's account: [their version]
- Prior record: [relevant history]
Analysis:
1. Elements of each charge (what prosecution must prove)
2. Evidence assessment (strength of prosecution's case per element)
3. Defense theories (2-3 options):
   - Theory A: [e.g., misidentification]
   - Theory B: [e.g., self-defense]
   - Theory C: [e.g., constitutional violation suppression]
4. For each theory:
   - Supporting evidence
   - Missing evidence (what we need to investigate)
   - Weaknesses
   - Expert needs
5. Recommended lead theory and backup
Format: Case theory memo
Note: This is defense strategy, not legal advice — for attorney review only

2. Evidence Analysis Matrix

Role: Defense attorney analyzing prosecution evidence
Task: Create an evidence analysis matrix for [case]
For each piece of evidence:
1. Evidence item (description)
2. Chain of custody (any gaps or issues?)
3. How obtained (warrant, consent, plain view, inventory)
4. Constitutional issues (4th, 5th, 6th Amendment concerns)
5. Admissibility assessment (likely admitted/excluded/uncertain)
6. Impact if admitted (how it affects each charge)
7. Defense response (explanation, impeachment, expert counter)
8. Suppression motion potential
Format: Evidence matrix table
Include: Suppression motion priority ranking (which items most worth challenging)

3. Witness Assessment Tool

Role: Defense attorney
Task: Create a witness assessment for [witness name/role]
Witness: [prosecution witness, expert, eyewitness, co-defendant]
Assessment:
1. Role in case (what they'll testify to)
2. Reliability factors (opportunity to observe, stress, lighting, distance)
3. Bias/motive (relationship to victim, defendant, or prosecution)
4. Prior statements (consistency, contradictions)
5. Criminal record (impeachment potential)
6. Cooperation agreement (are they getting a deal?)
7. Expertise (if expert — qualifications, methodology)
8. Cross-examination strategy (3-5 key areas)
9. Impeachment evidence needed (prior inconsistent statements, bias, etc.)
10. Deposition/interview priority (High/Med/Low)
Format: Witness assessment memo
Include: Specific cross-examination questions for top 3 areas

Motions & Pre-Trial

4. Motion to Suppress Analysis

Role: Criminal defense attorney
Task: Analyze suppression motion potential for [evidence type: search/seizure/statement/identification]
Input:
- How evidence was obtained: [describe]
- Legal basis for challenge: [4th/5th/6th Amendment]
- Key facts: [circumstances of search/arrest/interrogation]
Analysis:
1. Constitutional requirement implicated
2. Government's likely justification (warrant, exception, consent)
3. Strength of challenge (strong/possible/weak)
4. Key cases supporting suppression
5. Government's likely response
6. Hearing strategy (witnesses, cross-examination focus)
7. Evidence needed at hearing (officer testimony, video, documents)
8. Impact on case if suppressed (charges affected, remaining evidence)
Format: Suppression analysis memo
Note: Research current circuit and state-specific precedent

5. Motion to Suppress Draft

Role: Defense attorney drafting motion to suppress
Task: Draft a motion to suppress [evidence] for [case]
Motion structure:
1. Caption (court, case number, parties)
2. Title (Motion to Suppress [evidence type])
3. Introduction (what is being challenged and why — 1 paragraph)
4. Factual background (chronological, factual, supported by record)
5. Legal argument:
   - Standard for suppression (standing, reasonable expectation of privacy)
   - Constitutional violation (specific amendment, specific violation)
   - Case law supporting argument (binding and persuasive authority)
  . Application of law to facts
6. Conclusion and relief requested (suppress evidence and derivative evidence)
7. Certificate of service
Format: Formal motion compliant with [jurisdiction] rules
Include: Notice of hearing and proposed order

6. Discovery Demand Letter

Role: Defense attorney
Task: Draft a discovery demand for [case type: felony/misdemeanor] in [jurisdiction]
Discovery items:
1. All police reports and witness statements (including exculpatory — Brady material)
2. Physical evidence list and chain of custody
3. Lab reports and analyst credentials (including lab accreditation status)
4. Audio/video recordings (body cam, surveillance, interrogation, 911 calls)
5. Search warrants and supporting affidavits
6. Arrest reports and probable cause determinations
7. Criminal history of prosecution witnesses (impeachment material)
8. Cooperation agreements or deals with witnesses
9. Expert witness disclosures (CVs, reports, methodology)
10. Electronic evidence (cell records, social media, GPS, forensic reports)
11. Grand jury transcripts (if applicable)
12. Any exculpatory or impeaching evidence (Brady/Giglio obligations)
Format: Formal discovery demand letter
Reference: [Jurisdiction] discovery rules and Brady/Giglio obligations
Include: Deadline for response and remedy request if not produced

Trial Preparation

7. Voir Dire Question Generator

Role: Defense attorney preparing voir dire
Task: Create voir dire questions for [charge type] in [jurisdiction]
Question categories:
1. Exposure to case/media (if high-profile)
2. Law enforcement connections (family, friends, positive/negative experiences)
3. Crime type attitudes (specific to charge — e.g., drug attitudes for drug case)
4. Burden of proof understanding (can they hold prosecution to its burden?)
5. Presumption of innocence (do they really believe it?)
6. Mitigation understanding (can they consider mitigating factors?)
7. Punishment attitudes (do they presume incarceration? can they consider alternatives?)
8. Race/cultural bias (if relevant — carefully framed)
9. Prior jury service and outcomes
10. Follow-up questions for problematic responses
For each question: Purpose (what you're trying to learn) and red-flag answers
Format: Voir dire question bank with note-taking template
Note: Check jurisdictional rules on attorney-conducted voir dire vs. judge-conducted

8. Opening Statement Outline

Role: Defense attorney
Task: Create an opening statement outline for [case]
Structure:
1. Introduction (who you are, theme, theory — memorable phrase)
2. What the evidence will show (your version of events)
3. Key witnesses and what they'll say
4. Physical evidence and what it proves
5. What the prosecution won't prove (gaps, weaknesses)
6. Theme reinforcement (return to your theme)
7. Conclusion (what you'll ask them to do at the end)
Guidelines:
- Tell a story, don't argue
- Use plain language, not legalese
- Don't overstate what evidence will show
- Address weaknesses before prosecution does
- Keep to [minutes — typically 15-30 min depending on complexity]
Format: Opening statement outline with key phrases and transitions
Include: Theme options (2-3 to choose from based on case theory)

9. Cross-Examination Outline

Role: Defense attorney
Task: Create a cross-examination outline for [witness type: arresting officer/eyewitness/expert/co-defendant]
Objectives (rank by priority):
1. Impeach credibility (prior inconsistent statements, bias, competence)
2. Elicit favorable facts (support defense theory)
3. Expose gaps in investigation (what didn't they do?)
4. Challenge reliability (opportunity, perception, memory)
5. Show bias/motive (relationship to case, cooperation deal)
Question structure:
- Short, leading questions (one fact per question)
- Funnel technique (general → specific)
- Impeachment sequence (commit → credit → confront)
- Control (don't ask open-ended questions or 'why?')
For each topic area: 5-10 specific questions with document/exhibit references
Format: Cross-examination outline organized by topic
Include: Anticipated problematic answers and follow-up strategy

10. Closing Argument Framework

Role: Defense attorney
Task: Create a closing argument framework for [case]
Structure:
1. Theme restatement (return to opening statement theme)
2. Burden of proof reminder (prosecution must prove beyond reasonable doubt)
3. Element-by-element analysis (did prosecution prove each element?)
4. Evidence weaknesses (what was missing, unreliable, contradicted)
5. Defense theory (what the evidence actually shows)
6. Witness credibility comparison (who to believe and why)
7. Reasonable doubt argument (specific doubts, not just general)
8. What you're NOT saying (don't claim police are evil, don't overreach)
9. Verdict request (specific: not guilty on all counts, or lesser-included option)
Tone: Passionate but grounded in evidence. Persuasive but not manipulative.
Format: Closing argument outline with key phrases
Include: Anticipated prosecution rebuttal and response strategy

Plea & Sentencing

11. Plea Negotiation Strategy

Role: Defense attorney
Task: Create a plea negotiation strategy for [case]
Assessment:
1. Trial risk analysis:
   - Probability of conviction (High/Med/Low with rationale)
   - Exposure if convicted at trial (sentence range)
   - Collateral consequences (immigration, licensing, registration)
2. Plea options:
   - Option A: [charge/reduced charge] with [sentence recommendation]
   - Option B: [charge] with [alternative sentencing]
   - Option C: [different charge] with [benefits]
3. For each option: Client impact, collateral consequences, probation/parole terms
4. Negotiation strategy:
   - Opening position
   - Fallback position
   - Bottom line
   - Leverage points (suppression risk, witness problems, public interest)
   - What we offer in exchange (guilty plea, cooperation, waiver of appeal)
5. Client communication plan (how to explain options and get informed decision)
Format: Plea strategy memo
Note: Final decision is client's — document informed consent

12. Sentencing Memorandum

Role: Defense attorney
Task: Draft a sentencing memorandum for [client] convicted of [charge(s)]
Structure:
1. Introduction (client's background, acceptance of responsibility — if applicable)
2. Mitigating factors:
   - Personal history (childhood, education, family, employment, community)
   - Mental health/substance issues (treatment history, diagnosis if relevant)
   - Role in offense (minor vs. major, pressure/coercion, lack of sophistication)
   - Remorse and acceptance of responsibility
   - Rehabilitation efforts (treatment, education, community service since arrest)
   - Impact on dependents (children, elderly parents, others)
   - Prior record (or lack thereof)
3. Sentencing goals analysis (rehabilitation vs. punishment vs. deterrence)
4. Community support (letters of support summary)
5. Sentencing recommendation:
   - Specific sentence requested
   - Alternative sentencing options (if available in jurisdiction)
   - Conditions of probation/supervision
   - Treatment plan (if applicable)
6. Conclusion
Format: Sentencing memorandum
Tone: Persuasive, humanizing, grounded in facts
Include: Attachments list (support letters, treatment records, character references)

Best Practices

1. Always verify legal authority — AI may cite outdated or inapplicable cases. Verify all citations against current, binding precedent in your jurisdiction.

2. Protect client confidentiality — Never enter client names, case numbers, or identifiable details into AI tools. Use de-identified summaries.

3. This is defense work — All prompts are from the defense perspective. Prosecution has different tools and obligations.

4. Client decisions are the client's — Plea decisions, testimony decisions, and waiver decisions belong to the client. Document informed consent.

5. Consult with experienced counsel — Criminal defense has severe consequences. AI output should be reviewed by a qualified defense attorney. See our compliance officer prompts for regulatory defense.