James Keith Ray, was charged on Jan. 8 with interstate transmission of a threat to injure a person, according to the Lexington Herald Leader, after he reportedly posted content on Twitter threatening to kill one of the agents who questioned him at his home on the day after the bombing.

“Agent Brown if you ever step on this property while I’m here you are a dead man do you hear me there is no amount of armor that will protect you from the range of my f—–g soul,” Ray wrote in the tweet, according to the Lexington Herald Leader.

Federal agents first investigated Ray after they received a tip on the same day as the explosion, alerting them to suspect his potential role in the bombing, which deemed by officials as deliberate and intentional. The bomber was killed in the explosion, but a body was not detected inside the vehicle.

The tip indicated that “an individual named Ray was ranting about how AT&T was abusing their power and how their (AT&T’s) policies were criminal,” Special Agent William Kurtz wrote in a federal court affidavit, according to The Tennessean. The FBI had previously investigated Ray’s online posts in 2016, when he wrote online threats to AT&T and other businesses, in addition to discussing potentially exchanging housekeeping goods for weapons.

In 2018, authorities looked into Ray after he emailed a local news station, claiming he was being harassed by law enforcement, according to court records reviewed by The Tennessean. He reportedly threatened to take alternative action if he did not receive an explanation of his apparent wrongdoings, citing the shooting at the Capital Gazette in Annapolis, Maryland.

“Let the so-called story out of Maryland ring through to your offices and you look around and imagine the shock you’re going to realize that half of the people that you see right now might be dead by the weekend at the hand of someone who isn’t a strong as I am that has a little bit more of a temper than I do,” Ray wrote, according to The Tennessean’s review of the affidavit.

U.S. Magistrate Judge H. Brent Brennenstuhl denied Ray’s release on Friday, stating in an order: “One tweet clearly evidences a threat which is risk of harm to community. Testimony about subsequent arrests and at the time of this arrest he continued to evidence some degree of non-compliance.”