Thomas Crooks fired 8 times.
Three different weapons fired there that day.
One was Crooks’...one was that of a USSS sniper, and one was that of a local LEO sniper.
Crooks had 3 bombs in his vehicle and one drone.
He used the drone to size up the area around 4 PM in the afternoon, two hours before Trump took the stage at 6+ PM, and hours after the gates had been scheduled to open at 1. The drone may have been flown outside the perimeter looking in, I do not know if it actually overflied the stage or came within the perimeter, but there should be some witnesses among people setting up the equipment and stands.
The drone could have been planted in Crooks’ car by FBI participants.