A federal judge in Waco sentenced a Dripping Springs man to 18 months in federal prison Friday for making threats to kill individuals on Fort Hood back in February, according to United States Attorney Richard L. Durbin, Jr. and FBI Special Agent in Charge Christopher Combs.

READ MORE: Jury convicts man of threatening mass shooting on Fort Hood

Thomas Anthony Chestnut, Jr., 29, was found guilty on Sept. 19 by a federal jury of one count of threatening to assault or murder a uniformed service member, along with one count of interstate communications with threat to injure. Chestnut was arrested by FBI agents on Feb. 24

The U.S. Attorney's Office said Chestnut made verbal threats during a Feb. 22 phone call with a 1st Cavalry Division sergeant, who was based on post. Chestnut, investigators said, threatened to drive to Fort Hood, kill the sergeant, take hostages and start a mass killing spree before killing himself -- unless he was allowed to talk to someone of rank.

United States District Judge Robert Pitman ordered Chestnut to be placed on "supervised release" for a period of three years after completing his prison term, in addition to his 18-month sentence.