Criminal investigation skills for Claude Code should help investigators analyze evidence, organize case files, generate reports, and track leads systematically. Here's how to build them:
1. Evidence Analysis & Documentation
- Process crime scene photos, documents, witness statements
- Generate structured evidence logs
- Create timeline reconstructions
- Cross-reference evidence items
2. Case File Management
- Organize investigation materials systematically
- Track chain of custody
- Generate case summaries and reports
- Maintain investigative notes
3. Data Analysis
- Phone records analysis
- Financial transaction patterns
- Social network mapping
- Geographic pattern analysis
---
name: evidence-analyzer
description: Analyzes criminal evidence including documents, photos, and data files. Use when investigator needs to process evidence, create logs, generate timelines, or cross-reference case materials. Handles crime scene documentation, witness statements, and forensic data.
---# Step 1: Document Evidence
- Record item number, description, location found
- Timestamp acquisition
- Photograph and log condition
# Step 2: Create Chain of Custody Log
- Initial collector information
- Transfer records with signatures
- Storage location and access log
- Analysis requests and results
# Step 3: Generate Report
- Comprehensive evidence summary
- Chain of custody documentation
- Analysis results compilation# Automated Timeline Creation
1. Extract temporal data from:
- Witness statements
- Phone records
- Surveillance footage timestamps
- Digital evidence metadata
2. Cross-reference and validate:
- Identify conflicts
- Note corroborating evidence
- Flag gaps in timeline
3. Generate visual timeline with:
- All events chronologically ordered
- Evidence sources cited
- Confidence levels noted# Investigation Report Structure
## Executive Summary
- Case overview
- Key findings
- Recommendations
## Evidence Summary
- All evidence items catalogued
- Analysis results
- Chain of custody confirmed
## Investigative Actions
- Interviews conducted
- Searches performed
- Forensic analysis completed
## Conclusions and Next Steps- Never include real names, case numbers, or identifying information in example skills
- Add explicit reminders about data handling requirements
- Include disclaimers about evidence preservation
- Reference legal/departmental procedures
# Quality Checks (Include in every investigation skill)
CRITICAL - Verification Steps:
1. Cross-reference all facts with source documents
2. Flag assumptions vs. confirmed information
3. Note confidence levels for conclusions
4. Preserve original evidence integrity
5. Document analysis methodology# Before Processing Evidence
1. Confirm proper authorization for access
2. Document current state of evidence
3. Create working copies (never modify originals)
4. Log all analysis steps performed
5. Secure outputs appropriately---
name: crime-scene-photo-analyzer
description: Analyzes crime scene photographs to document evidence, identify items of interest, and generate structured reports. Use when investigator uploads scene photos, asks to "analyze crime scene", "document evidence in photos", or "generate photo log".
---
# Crime Scene Photo Analysis
## Instructions
### Step 1: Initial Assessment
- Identify photo metadata (timestamp, camera, location if available)
- Determine scene type and context
- Note lighting conditions and image quality
### Step 2: Systematic Documentation
For each photo:
1. Assign sequential evidence markers
2. Document visible items with descriptions
3. Note spatial relationships
4. Identify potential evidence requiring further analysis
### Step 3: Generate Photo Log
Create structured log with:
- Photo number and filename
- Timestamp and photographer
- Items visible and their locations
- Evidence markers applied
- Follow-up actions needed
### Step 4: Cross-Reference
- Link photos showing same evidence from different angles
- Identify items appearing in multiple photos
- Note any discrepancies or areas needing clarification
## Output Format
Use structured markdown tables for photo logs:
| Photo # | Timestamp | Evidence Items | Location | Priority |
|---------|-----------|----------------|----------|----------|
| 001 | [time] | [items] | [location] | [H/M/L] |
## Quality Checks
- Verify all photos accounted for
- Confirm evidence markers are sequential
- Check for missed items in background
- Note any photo quality issues affecting analysisEssential Tests:
- Accuracy: Process known case materials and verify output matches manual analysis
- Completeness: Ensure no evidence items are missed
- Chain of custody: Verify all handling is documented
- Report quality: Check reports are court-ready and professional
Red Flags to Catch:
- Speculation presented as fact
- Missing source citations
- Broken chain of custody
- Inconsistent date/time formats
- Missing required legal disclaimers
- Always Include Disclaimers
## Important Notes
- This analysis aids investigation but does not replace professional forensic examination
- All conclusions should be verified by qualified personnel
- Maintain proper evidence handling procedures per departmental policy
- Consult legal counsel regarding admissibility requirements- Build in Verification Steps
- Cross-reference capabilities
- Conflict detection
- Source tracking
- Confidence scoring
- Make Skills Modular
- Separate skills for different evidence types
- Combine skills for comprehensive case analysis
- Allow skills to reference each other's outputs
- Document Methodology
- Explain analysis approaches used
- Note any assumptions made
- Cite standards or procedures followed
- Use
skill-creatorin Claude Code to generate your first investigation skill - Start with a single workflow (e.g., evidence logging)
- Test with de-identified practice materials
- Iterate based on investigator feedback
- Expand to additional investigation workflows
The goal is to make Claude Code a reliable investigation assistant that maintains professional standards, preserves evidence integrity, and produces court-ready documentation.