Convicted Sex Offender Indicted on New Child Sex Abuse Charges

Baltimore, Maryland - A federal grand jury indicted a Maryland man, today, in connection with child sex abuse crimes.

David Lee Mangum, 29, of Frederick, is charged with five counts of receipt of child sexual abuse material (CSAM), one count of transferring obscene material to a minor, and one count of possession of CSAM.

Kelly O. Hayes, U.S. Attorney for the District of Maryland, announced the indictment with Deputy Assistant Director William Ferrari, U.S. Department of State, Diplomatic Security Service (DSS) - Office of Investigations, and Sheriff Chuck Jenkins, Frederick County Sheriff's Office (FCSO).

According to the indictment, during 2025, and early 2026, Mangum utilized internet-based social media accounts to receive visual depictions of at least five minor victims engaged in sexually explicit conduct. On at least one occasion, Mangum sent one of the minor victims a video of himself engaged in sexually explicit conduct. A subsequent law enforcement search of Mangum's cellular phone also revealed numerous other CSAM images.

Mangum previously pled guilty in October 2021, in Frederick County, Maryland, Circuit Court, to three felony counts related to the filming, soliciting, and promoting CSAM. Mangum received a 10-year prison term, with all but 18 months suspended.

This case is part of Project Safe Childhood, a nationwide initiative launched in May 2006 by the Department of Justice to combat the growing epidemic of child sexual exploitation and abuse. Led by the United States Attorney's Offices and the Criminal Division's Child Exploitation and Obscenity Section, Project Safe Childhood marshals federal, state, and local resources to locate, apprehend, and prosecute individuals who sexually exploit children, and to identify and rescue victims. For more information about Project Safe Childhood, please visit justice.gov/psc. For more information about Internet safety education, please visit justice.gov/psc and click on the "Resources" tab on the left of the page.

An indictment is not a finding of guilt. Individuals charged by indictment are presumed innocent until proven guilty at a later criminal proceeding.

If convicted, Mangum faces a mandatory minimum sentence of 15 years and a maximum sentence of 40 years in federal prison for each count of receipt of CSAM. In addition, Mangum faces a mandatory minimum sentence of 10 years and a maximum sentence of 20 years for the CSAM possession charge, along with a maximum sentence of 10 years on the transfer of obscene material to a minor charge.

Actual sentences for federal crimes are typically less than the maximum penalties. A federal district court judge determines sentencing after considering the U.S. Sentencing Guidelines and other statutory factors.

U.S. Attorney Hayes commended the DSS and FCSO for their work in the investigation, along with the Madison Police Department (Wisconsin); Collier County Sheriff's Office (Florida); Hillsborough County Sheriff's Office (Florida); and New York State Police for their valuable assistance. Ms. Hayes also thanked Assistant U.S. Attorneys Steven T. Brantley and Colleen Elizabeth McGuinn who are prosecuting the federal case.

For more information about the Maryland U.S. Attorney's Office, its priorities, and resources available to help the community, visit justice.gov/usao-md.

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