People... my gosh.
STRATEGY. Dad, mom, and step-dad are not pulling these moves out of thin air. They are not pulling the strings regarding the media (following the coverage, writing on chat boards). They are under the guidance of LE, who knows what's going on and are doing the job... which includes keeping the details of the investigation under wraps, but to the chagrin of folks on WS.
There's a *message* in both the form (who was there, what was around, where it was held) and content of today's event (the statement, more humanizing info. shared [as they did in the joint interview last week]).
I agree with other posters: the entire event was directed at the SM by LE investigators... as the step-dad would well understand.