According to Alex Jones and now the prosecutor, there was a public walkway that crossed the roof. He was able to hop the guardrail and make a vary short drop down to the roof itself and then run to his position. The walkway was too high to exit that way and so he ran to the edge and dropped down.
I haven’t see the video, but it apparently exists. The prosecutor referenced it.
Why not leave the rifle in the gutter, although I don’t see how he could disguise the nearly 40”+ weapon while jumping down... how did he reconnect it? How to disconnect it... Does taking it apart and putting it together change the shooting profile?