Delaware State Police have arrested an 18-year-old male after an investigation determined he made online threats toward Sussex Central High School in late March.

The investigation began on Thursday, March 30, after troopers received information that someone had posted several threatening comments directed toward Sussex Central High School on social media. As a result of the posts, multiple troopers responded to the school on Friday, March 31, in order to provide additional security. However, no incidents occurred at the school that day.

Troopers were able to trace the online posts to the home of a 12th-grade Sussex Central student: 18-year-old Zefryn Stillman of Millsboro. On Friday, May 12, a search warrant was obtained for Stillman's residence, located in the 28000 block of Cedar Street, where evidence linking him to the incident was found.

Stillman was arrested and charged with felony terroristic threatening. He was then released on $2,500 unsecured bond.