A criminal complaint has been filed against an 18-year-old man. He is accused of planning a terrorist attack and expressing allegiance to a specific group. The man's messages to an informant over nearly two years revealed his hatred and desire to join a terror organization. He considered supporting different groups before making a decision.

The man was arrested after purchasing a firearm and ammunition. His intentions were to carry out a mass shooting. Further details about the case are available from federal authorities.

An affidavit provides more information about the man's arrest and alleged plans.