A South Dartmouth man is facing child pornography charges.

The U.S. Attorney's Office announced on Thursday that 29-year-old Jack L. Bean, Jr. was indicted on one count of receipt of child pornography and one count of possession of child pornography.

Court documents say an investigation began in September 2015 after an Internet-based bulletin board dedicated to the advertisement, distribution and production of child pornography was identified by law enforcement officials.

Bean was allegedly identified as one of the users of the bulletin board.

A search was executed by law enforcement officers, and the U.S. Attorney's Office says that during the search Bean admitted downloading and saving child pornography from the Internet, and stated that he had a sexual preference for girls who are roughly 14 years of age.

Agents allegedly identified 40 images and 29 videos of children engaged in sexually explicit conduct on Bean’s laptop during the execution of the search warrant.

The charge of receipt of child pornography provides for a mandatory minimum sentence of five years and no greater than 20 years in prison, a mandatory minimum of five years and up to a lifetime of supervised release, and a fine of $250,000.

The charge of possession of child pornography provides for a sentence of no greater than 20 years in prison, a mandatory minimum of five years and up to a lifetime of supervised release, and a fine of $250,000.

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