A Marietta man got 15 years in prison for receiving child pornography the top federal prosecutor in metro Atlanta announced Tuesday.

Charles Pelts, who was a registered sex offender, had received approximately 11,000 images of child pornography, including images of toddlers and infants. His cell phone contained approximately 4,050 images of child pornography, according to federal prosecutors.

“By trafficking in graphic images of pornography depicting very young children, Pelts, 35, contributed to the horrifying child exploitation trade,” said U.S. Attorney Sally Quillian Yates. “We remain steadfast in partnering with federal and local law enforcement officers to vigorously prosecute those engaged in the market for child pornography.”

The case was investigated by the Department of Homeland Security Investigations, Immigration and Customs Enforcement, after its agents discovered that Pelts had emailed child pornography to other accounts — including images depicting graphic sex acts involving very young children.

Pelts pleaded guilty on May 14. Pelts will be required to register federally as a sex offender when he is released from prison and be under supervision for life, Yates said.