An eyewitness gave a statement to BBC news, very angry about why nothing was done by secret service to secure a specific area.
The eyewitness describes watching the shooter carry a long rifle onto a barn roof. The eyewitness alerted police; no immediate action was taken. The eyewitness grew frustrated with police and secret service. The eyewitness saw the gunman prepare in position for 2 to 3 minutes before shooting 5 shots at President Donald Trump. The eyewitness saw law enforcement then engage and kill the shooter.
Video interview with BBC Embedded Below (fyi, video might not last):