Recently Matt Bracken had predicted this scenario and also wrote about it in His Enemies Foreign and Domestic Book:
Eerily similar...... BULLETS RAIN DOWN UPON A
PACKED FOOTBALL STADIUM, killing dozens, and triggering a panic
stampede which leads to a thousand more deaths. A police marksman kills
the sniper, a mentally unbalanced Desert Storm veteran holding a smoking
assault rifle. It's an open and shut case, or so America is led to
Matt Bracken on INFOWARS ( FWIW) :
On a side note. The shooter went through all that trouble to randomly spray bullets into a crowd just to commit suicide?