Brian Fanelli was chief in Mount Pleasant, New York, when he was arrested last year.
Federal authorities have charged 71 people in the New York City area in what officials called one of the largest-ever roundups locally of people who anonymously trade child porn online.
The evidence against a former suburban police chief charged with distributing child pornography includes videos, screen shots and statements he made after his arrest, a prosecutor said Tuesday.
Mount Pleasant Supervisor Joan Maybury said Chief Brian Fanelli was taken into custody Thursday by Homeland Security agents. He is expected to be arraigned in federal court in White Plains.