Insights & Guides

The DeceptionDetection Blog

Straight, practical writing on private investigation, lie detection and counter-surveillance — how it works, what is lawful, and how to get a clear answer.

A person checking a phone late at night — signs a partner may be cheating
Relationships

Signs a Partner Is Cheating — and How to Know for Certain

4 August 2026 · 6 min read

The behavioural, digital and financial signs a partner may be cheating — why none proves anything alone, and the two lawful ways to get certainty.

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EEG brain-response testing — P300 lie detection compared with the polygraph
The Science

P300 EEG vs the Polygraph: Which Lie Detection Actually Works?

7 August 2026 · 7 min read

The polygraph measures nervousness; P300 EEG measures whether the brain recognises specific information. Here is why that difference matters.

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A private investigator working lawfully — what UK investigators can and cannot do
Private Investigation

What a Private Investigator Can Legally Do in the UK

11 August 2026 · 7 min read

Surveillance, tracing and background checks within the law — and the lines a legitimate UK investigator never crosses.

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A boardroom — how businesses uncover insider fraud, leaks and bugging
Corporate

Insider Threats: How Businesses Uncover Fraud and Leaks

14 August 2026 · 6 min read

Fraud, data theft and leaks come from inside. How corporate investigation and bug sweeps uncover them — discreetly.

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