SIGNAL & SHADOW · ARCHIVE

Methods

Step-by-step tutorials drawn from working casework.

All Posts

OSINT in conflict zones: weapons, units and evidence

Methods

Oct 13, 2026

OSINT in conflict zones: weapons, units and evidence

Derek Bowler

Trace shell companies to the beneficial owner behind them

Methods

Oct 6, 2026

Trace shell companies to the beneficial owner behind them

Derek Bowler

Counter-surveillance when your subject is watching back

Methods

Sep 29, 2026

Counter-surveillance when your subject is watching back

Derek Bowler

Link tender awards to beneficial owners and payment data

Methods

Sep 22, 2026

Link tender awards to beneficial owners and payment data

Derek Bowler

AI vision models for geolocation: use and limits

Methods

Sep 15, 2026

AI vision models for geolocation: use and limits

Derek Bowler

Capstone: verifying crisis footage end-to-end

Methods

Sep 8, 2026

Capstone: verifying crisis footage end-to-end

Derek Bowler

Climate and disaster investigation workflows

Methods

Sep 1, 2026

Climate and disaster investigation workflows

Derek Bowler

Archive recovery: deleted and ephemeral content

Methods

Aug 25, 2026

Archive recovery: deleted and ephemeral content

Derek Bowler

Website infrastructure analysis: WHOIS, DNS and SSL

Methods

Aug 17, 2026

Website infrastructure analysis: WHOIS, DNS and SSL

Derek Bowler

Dark web legal and ethical boundaries for investigators

Methods

Aug 10, 2026

Dark web legal and ethical boundaries for investigators

Derek Bowler

Mobile location intelligence: advertising IDs and BSSID

Methods

Aug 3, 2026

Mobile location intelligence: advertising IDs and BSSID

Derek Bowler

Financial flows and sanctions evasion: investigator's guide

Methods

Jul 27, 2026

Financial flows and sanctions evasion: investigator's guide

Derek Bowler

Satellite imagery change detection: Sentinel and Landsat

Methods

Jul 20, 2026

Satellite imagery change detection: Sentinel and Landsat

Derek Bowler

Methods

Jul 13, 2026

Discord and Niche Forum Investigation

Derek Bowler

Wi-Fi positioning and geo-IP: locating by network data

Methods

Jul 6, 2026

Wi-Fi positioning and geo-IP: locating by network data

Derek Bowler

Audio intelligence: location and context from sound

Methods

Jul 1, 2026

Audio intelligence: location and context from sound

Derek Bowler

Chronolocation video: establishing when footage was filmed

Methods

Jul 1, 2026

Chronolocation video: establishing when footage was filmed

Derek Bowler

Clean research browser: Firefox and Mullvad for OSINT

Methods

Jul 1, 2026

Clean research browser: Firefox and Mullvad for OSINT

Derek Bowler

Detecting deepfakes in video and audio verification

Methods

Jul 1, 2026

Detecting deepfakes in video and audio verification

Derek Bowler

Investigating yourself: the OSINT dry run on your own digital footprint

Methods

Jul 1, 2026

Investigating yourself: the OSINT dry run on your own digital footprint

Derek Bowler

Investigator welfare: managing stress, trauma and burnout

Methods

Jul 1, 2026

Investigator welfare: managing stress, trauma and burnout

Derek Bowler

Legal and ethical boundaries of OSINT: GDPR, data minimisation and defensible collection

Methods

Jul 1, 2026

Legal and ethical boundaries of OSINT: GDPR, data minimisation and defensible collection

Derek Bowler

Network mapping with Maltego and Gephi for investigators

Methods

Jul 1, 2026

Network mapping with Maltego and Gephi for investigators

Derek Bowler

Pinpointing location through visual clues: shadows, architecture and terrain

Methods

Jul 1, 2026

Pinpointing location through visual clues: shadows, architecture and terrain

Derek Bowler

Tracking aircraft with ADS-B and transponder records

Methods

Jul 1, 2026

Tracking aircraft with ADS-B and transponder records

Derek Bowler