Can dual citizens face additional complications from NCIC data when travelling on their non-US passport?

Yes. Interpol alerts generated from NCIC data are linked to biographic identifiers — name, date of birth, passport numbers — not solely citizenship. If you travel on a non-US passport, border systems in Interpol member countries may still flag your identity through name-matching algorithms or biometric checks. Additionally, some countries share advance passenger information with US authorities, potentially triggering alerts regardless of which passport you present. Dual citizens often require a coordinated legal strategy addressing both US records and Interpol notices simultaneously.