National AI Forensic Grid: Federated Multi-Modal Deepfake Detection and Cryptographic Evidence Infrastructure for Law Enforcement

This disclosure presents a federated forensic infrastructure designed for detection of malicious synthetic media and preservation of evidentiary integrity across law enforcement jurisdictions. The system integrates multi-modal deepfake detection, cross-node artifact intelligence exchange, and cryptographic chain-of-custody preservation. The disclosed architecture enables scalable national coordination, standardized forensic scoring, and tamper-resistant evidence management suitable for judicial proceedings.