ALEXANDRIA, Va. -- A Virginia man investigated by the FBI after his family reported he had converted to Islam and may have been radicalized has been sentenced to 20 years in prison.

Sean Duncan was sentenced in federal court Friday in Alexandria. Duncan had pleaded guilty in April to obstruction of a terror probe and receipt of child pornography.

Duncan and his wife were denied entry to Turkey in 2016. Court documents say a relative then approached the FBI saying Duncan espoused radical views, including support of beheadings. Agents also found evidence of child pornography. When authorities arrived to search his home in Sterling, Duncan fled barefoot, tossing a bag with a thumb drive broken into pieces.

The 22-year-old later admitted he had espoused support for the Islamic State group since 2015.