FOND DU LAC, Wis.– A teen in Fond du Lac has been arrested over threats of a potential mass shooting.
The Fond du Lac County Sheriff’s Office says they seized multiple firearms, a computer, and a cell phone, as part of an investigation into the 15-year-old.
Detectives began investigating after receiving a tip from a person outside the U.S. who expressed concerns over online interactions with the teenager…