It's automatically required to be released by the Sunshine request because the officer who responded to the 911 call and reviewed the surveillance video, had personally gone to the sight of the shooting and ID'd Brown as the person in said video. - AKA the robbery report filed is a report related to Brown, duh.
It's further related because Jackson had already said the day the shooting happened that [he guessed/thought] Wilson [must have/may have/might have] recognized Brown as the suspect of the robbery that was sent out over dispatch. - AKA again, the physical description that went out over the radio was related to Brown.
Therefore FPD had no choice but to release the robbery report as per the law. The report from Wilson was like excluded for two reasons A) because County and FPD are separate entities and Wilsons report went to County not FPD, and B) because Wilson's report is subject to an on-going investigation and therefore not yet subject to the Sunshine law - an option County elected to exercise.
Personally I wish that County had released Wilson's report in full because I think it might have cleared up some the misconceptions and bullshit that followed while the media raked a clearly inexperienced bumbling Jackson over the coals. Though it's been noted that County's standard protocol is to NOT release any information until investigations are over, so I can't really blame them. Just might have been a good idea to abandon protocol for Wilson's report instead of redacting the report to follow SOP in what was clearly not a SOP case. Then we would know once and for all if Wilson did or did not suspect Brown was involved with the robbery, if Wilson said there was a fight in the car window that resulted in gunfire, and if Wilson conclusively said Brown charged him, and thus we could have skipped the ring around the rosy with all that. And instead it just would have been, "Well... the policeman's just lying in the report to cover his ass."