I get the sense that the presser today was not to ask for the public’s help in locating FH - it was to send a message to him and those who know him to turn himself in. Wouldn’t be the first time LE would communicate to a POI/suspect via a presser/the media.
We were given zero description of his appearance, no last known location or where he might be aside from ‘Georgia’, no vehicle, nada. Public wasn’t really asked for their help.
I think it’s also possible a reporter or someone else had figured something out, and LE was pressed to put the info out before someone else did outside of LE. Something forced their hand.
Side note, that sheriff wasn’t playing around.