A federal indictment charges that a North Carolina man communicated through social media with Islamic State member Junaid Hussain during his planning of a domestic terror attack, according to a court document released Thursday evening.

Justin Nojan Sullivan of Burke County, N.C., was indicted by a grand jury in February for the December 2014 killing of his 74-year-old neighbor, John Bailey Clark. The defendant told authorities he killed the man to steal his money to buy an assault rifle he could use in a terrorist attack at a concert or club. He had hoped to kill 1,000 people.