CHARLOTTE, N.C. – Authorities in South Carolina have investigated over 60 threats against schools in the last two weeks, according to the state’s top law enforcement agency. A total of 23 counties have received threats since Sept. 4, according to the South Carolina Law Enforcement Division (SLED). That’s the same day four people were shot and killed at Apalachee High School in Georgia. A 15-year-old student and his father are facing multiple charges in connection with the tragedy.