MOULTON — An 18-year-old Trinity teen has been charged with making a terrorist threat after his text to his girlfriend put Lawrence County High School under a modified lockdown this morning.

Mason Stillwell, 18, of Lawrence County 221 in Trinity, was arrested today just before noon, Capt. Timothy McWhorter of the Lawrence County Sheriff’s Department said.

Assistant Superintendent Johnny Yates said the school implemented the safety measure at about 8:30 this morning. Classes continued but entrances and exits of the building were monitored.

Yates said the modified lockdown was lifted just before noon.

Superintendent Heath Grimes said via text that one student texted an "ambiguous threat, so until he could be brought in and secured/deemed safe, the school was placed on modified lockdown."

Yates said the threat was from a former student to a current student.

He said Moulton Police and Lawrence County Sheriff’s deputies picked up the suspect prior to ending the lockdown.

Sheriff Gene Mitchell said Moulton Police Chief Lyndon McWhorter is handling the case.