DEVELOPING: Sources familiar with events surrounding the shooting tell @CBSMiami that when Coral Springs police arrived within minutes of the shooting call, they found not only the BSO School Resource Officer outside the school taking up a defensive position but at least three other @browardsheriff deputies who were waiting outside the school. The Coral Springs officers were told by BSO officers on the scene to wait, but the Coral Springs officers blew past them and immediately entered the building.These events were first reported by @CNN. A spokeswoman for @browardsheriff and @ScottJIsrael confirms they are investigating if BSO deputies waited while...