Obi Wan
https://www.youtube.com/watch?v=gTIcYtTZN0w
Secret Service Director Drilled by Congress LIVE
The Second Assassin needed to be in position directly behind Crooks, and they shot over Crooks first. After the first 3 shots were fired, Crooks opened up to spray bullets indiscriminately at the crowd in Trump's direction.
If the shots came from the church, more likely shot would have done its job, but the trajectory would have been wrong to put blame on Crooks the "lone gunman".