Why "AI Detector" Tools Are Not Enough
Several commercial tools claim to detect AI-generated media. Attorneys and investigators who rely on them should understand their significant limitations before presenting their output as evidence.
These tools produce probabilistic scores — a percentage likelihood that media is AI-generated. They are not based on analysis of specific forensic artifacts in the file. They cannot identify which tool generated the media, they are not validated against known standards, and their output cannot be independently reproduced. Courts applying Daubert or Frye standards have significant grounds to exclude them as the sole basis for an expert opinion.
This does not mean AI-generated media cannot be forensically examined. It means the examination must be grounded in something more than a commercial tool's score.
What Forensic Examination Actually Involves
A reliable AI forensics examination draws on multiple lines of analysis:
- Metadata analysis: What does the file's metadata show about its creation history, software, and modification chain? Authentic photographs carry camera metadata that AI-generated images typically lack or fabricate inconsistently.
- Compression artifact analysis: How a file has been compressed and re-compressed leaves distinct patterns. AI-generated images have characteristic compression signatures that differ from photographs.
- Pixel-level statistical analysis: Generative AI models produce characteristic statistical patterns at the pixel level that can be identified through noise analysis and frequency-domain inspection.
- Model artifact signatures: Specific GAN and diffusion model architectures leave characteristic artifacts — facial geometry anomalies, background inconsistencies, lighting discontinuities — that can be documented as observable findings.
What Examination Can and Cannot Establish
Forensic examination can establish: the presence or absence of specific artifact patterns consistent with AI generation; inconsistencies in metadata that suggest artificial creation; and observable anomalies in the file that are characteristic of known generative model outputs.
Forensic examination cannot establish with certainty: that media is definitively authentic; that media is definitively AI-generated to the exclusion of all other explanations; or the specific tool or model used to generate media in most cases.
Findings are expressed as what the evidence shows — not as absolute ground truth. An examiner who promises certainty in either direction should be asked to explain, in detail, the specific artifacts supporting that conclusion.
Original Files Are Essential
AI forensics examinations require the original digital file where possible. A screenshot of a video frame, a re-photographed image, or a re-encoded audio clip has already destroyed most of the artifacts that make forensic analysis possible. If you are preserving potentially AI-generated media, preserve the original file — not a copy.