ST. MARY'S COUNTY, Md. — The St. Mary's County Sheriff's Office says recent threats of mass violence against public schools within the county aren't credible.
Wednesday marked one year since a gunman opened fire inside of Great Mills High School, killing a student and injuring another.
RELATED: Gunman dead, 2 students injured in Maryland school shooting
Officials said the most recent threats circulated through social media and text messages, and referenced last year's tragedy.
After an extensive investigation, detectives were unable to identify any credible threats.
It was just before 8 a.m. on March 20, 2018 when 17-year-old Austin Rollins entered the school, shooting 16-year-old Jaelynn Willey and 14-year-old Desmond Barnes. Two days later, Willey died after being taken off life support.
Investigators concluded Rollins shot and killed himself after being confronted by School Resource Officer, Blaine Gaskill.
SEE ALSO: Evidence shows that Great Mills High School shooter shot himself, 911 calls released
The Sheriff's Office says they will continue to investigate all threats reported, to ensure the safety of students and faculty.
