How do you make it sufficiently authoritative and trustworthy so that the general population including us doesn't go out and seek hearsay and speculation to get

How do you make it sufficiently authoritative and trustworthy so that the general population including us doesn't go out and seek hearsay and speculation to get their jollies. I mean, what interest could the identity of the killer have for people while the shootout was in progress. Why not just stop once the basic unbiased facts have been surfaced? Everything else can wait for the cold light of reason and time.