The press will interview everyone who can talk, including the janitor at the lab, if possible..We will get information..some of it meaningless, some of it wrong.
That's true, and information will come out in due time. I guess I just don't see the point of the protracted press conference we just endured.
Have one person come out, announce that the suspect (POI)- or whatever the appropriate term is - has been been arrested or charged or whatever the status is. Acknowledge the victims families and say it's been a long time in coming, thank everyone involved, then say as with any ongoing investigation we can't answer any questions at this time.
10 minutes - not a public spectacle.