Actually that info is available.
Robbery Call at time 50
Initial descriptions at time 51.
Responding officer arrives time 55.
Reports no one in immediate area matches description time 56.
Provides additional descriptive info time 57.
Wilson check out of current call time 00.
Wilson encounters Brown time 01.
Second officer arrives on scene (Brown/Wilson) about time 04, by which time Mr Brown is unfortunately already down.
Thanks. That is good detail and kind of confirms what I think probably happened.