A judge has sentenced a 27-year-old Tennessee man to 77 years in prison for his targeting of young girls online as part of the extremist network 764.

A judge has sentenced a 27-year-old Tennessee man to 77 years in prison for his targeting of young girls online as part of the extremist network 764.

A member of the online extremist network "764," which targets children and minors online, received a record 77-year federal prison sentence on Wednesday.