The most farcical of all is that Bill Brown seems to believe and defend a theory which says that Callaway, who was less than on block (approx 0.1 mile) away from the shooting needed 5 minutes, after the shots, to get to the scene and call the dispatcher. Says it all, really....
All ya gotta do is read Callaway's own words. He did not make his way up to the corner until after the killer had reached the corner of Patton and Jefferson.
Callaway was at the scene sooner than five minutes after the shots; he just did not get on the police radio to report it immediately upon arriving at the scene.
You really should read his testimony a little closer.