Routh hid outside a fence overlooking the sixth hole of the course, where authorities found an AK-47-style rifle, a bag of snacks, a digital camera and bags containing metal plates meant to withstand return fire by the US Secret Service, according to prosecutors.
A Secret Service agent patrolling the course ahead of Trump spotted Routh and opened fire after noticing the rifle sticking through a fence. Routh fled and was later arrested along a Florida highway, prosecutors said.
Routh was initially charged with gun-related offences. An indictment last week added the attempted assassination charge along with assault on a federal officer and possessing a firearm in furtherance of a crime of violence.
