The Pentagon is using polygraphs to hunt leakers, but the tests are more theater than fact

In August 2026, investigators administered polygraph tests to roughly 50 military officers and civilian employees on the Joint Staff, part of a probe into leaks about the Iran war and depleted munitions, The New York Times reported. The paper called the scope unprecedented for the modern military.

A former 27-year CIA veteran writes that polygraphs are widely regarded by scientists as pseudo-scientific: they measure heart rate, blood pressure and sweat, not truth itself. The National Academy of Sciences in 2003 and the American Psychological Association in 2004 both concluded the technique rests more on theater than fact, and courts mostly agree, with only a handful of states allowing limited admissibility.

Despite that record, polygraphs remain central to security clearances, often serving as a subjective filter where an examiner's hunch about an elevated reading can derail a career. The Trump administration expanded polygraph use across the executive branch in 2025, and agencies including DHS and the FBI have used the tests more punitively to root out internal dissent, reopening even cold cases like the Dobbs leak.

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