Speculation is fun. Impatience for "the answer" is natural (I think).
Maybe the media promised this guy that his family would be rich, in exchange for a captivating story (I doubt it, but you can see how far speculation can go, if one considers news-story to be a motive).
I think he was a victim, not a perp. Based mostly on 1) my prejudice relating to the intelligence of pizza delivery people (good heart, weak mind) and 2) his demeanor.
Is there information that would jeopardize the case? Is there information of importance to national security?
If the bank robber had not been apprehended, the footage would have been released already ("help us catch him").
Even the Tampa teen and John Lihnd Walker had non-crime photos released (there is always a yearbook photo and driver's license even if the family doesn't want to share)