Well, that seems be the case per the 'robbery' part and his brief case was taken. (Beyond being a victim himself here; given the volume of crime/drug crime. . .was he witness to one?)
Whatever the case, this was certainly a series of most 'unfortunate events' for John Wheeler; and in a rather short period of time. Sad that the only connection, thus far, for his getting help was made with 'security personnel' in parking garage. . .the worst turn, it appears; is his walking away.
Is there time limit per FOIA per autopsy discovery - or does it even apply?
We can be more than reasonably certain, that at least, much more is known here! (?)
AS long as the case is being investigated and not solved the information will not be available through FoI. Not sure if it becomes a cold case. Maybe featured on one of the “cold case” TV shows asking for help.
BUT as of now IMO, still waiting for lab reports.