WACO, Texas (KXAN) — A Dripping Springs man who threatened to kill people on Fort Hood will spend 18 months in federal prison.

Authorities say on Feb. 22, 2017, Thomas Anthony Chestnut, Jr., 29, called the Army post and spoke to a sergeant whom he proceeded to threaten. Chestnut went on to say he would go to Fort Hood, kill the sergeant, take hostages and stage a mass shooting and kill himself if he weren’t allowed to speak with someone of rank.

When Chestnut was allowed to speak to a major, he told him he was a former soldier wrongly accused of a crime and was eventually released from prison in 2016. Federal authorities say Chestnut then made another threat about shooting soldiers if he wasn’t allowed to speak to someone else about his back pay, or the money he believe was owed to him.

Chestnut was arrested two days after making the call. A jury found him guilty on one count of threatening to assault or murder a uniformed service member and one count of interstate communications with threat to injure in September.

The federal judge in his case also ordered Chestnut to be placed on supervised release for three years after he’s released from prison.