The first shot fired was by an ATF agent accidently as he exited the trailer. (through his own leg) The guy in the RH side of the pickup cab then unloaded on David Koresh standing in the front doorway with a MP5 sub gun. The door was riddled and Koresh was seriously wounded and staggered back into the residence with his baby in his arms. After that the feds fired at the side of the building until they ran out of ammo!
The door was one of the first things hauled to the dump. I still have photos somewhere.