Follow NBC News coverage of the apparent attempted assassination of former President Donald Trump at his Florida golf course.

Prosecutors are scheduled to argue on Sept. 23 that Routh should remain in prison before a trial. Routh was ordered to remain in custody after an earlier hearing, in which prosecutors claimed Routh is a flight risk and poses a danger to the public. He is scheduled to appear for an arraignment on Sept. 30.

The new federal indictment in Florida comes on top of two gun charges against Ryan W. Routh, an itinerant contractor with an extensive criminal record.