(SACRAMENTO.CBSLOCAL) — A child pornography arrest helped by Google is raising privacy concerns.

Federal investigators arrested a Woodland man on child pornography charges after Google found images on his computer.

Google’s cyber criminal investigators are faceless servers, looking across the Internet for child pornography. Each image that’s uploaded to the Web has its own unique digital fingerprint.

And according to a criminal complaint obtained by CBS13, they found it in Woodland. Stunned neighbors on Carlsbad Place recently woke up to the sight of police cars and FBI raid jackets.

“It was pretty scary for everybody,” said Lindsey Griffiths.

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