In the case of the Mississippi family now missing several days, the cops arrest a cousin and promise a "profound development," but won't say anything else. That's enough for Fox to put up a criminologist, a forensic specialist and a judge to speculate on what they've found, what the autopsies will show, whether they'll go for the death penalty based on how long the family might have suffered, what kind of a deal a lawyer would plea for versus how the cops might legally lie to the guy to get him to confess.
This is a replay of the kind of behavior that went on when a body was found in a Maryland park but the police had not yet confirmed (because they themselves weren't yet sure) that it was a certain missing Washington intern, or the truly pathetic behavior we witnessed when the press desended like vultures on a backyard in Washington state during the hunt for the DC snipers: having no clue what the cops were digging up the yard for they were reduced to basically trying to guess if it was bigger than a bread box.
Report what you know -- there has been an arrest, there is reason to believe this man would have had a motive to wish this family ill (and here are the motives), the cops have promised a "profound development" but refuse for now to say what it is. This kind of wild speculation does no one any good whatsoever and is frankly irresponsible. If in fact bodies have been found bring the forensic specialists on then. Until then there is more than enough news to talk about without this kind of macabre speculation. Speculation does not equal scooping.