I agree. If that is still the case, holding back info is fine with me.
My problem was that the statement was so vague that it was meaningless. Either tell me, "there are still leads," or "we really can't talk about an unclosed investigation one way or the other." And, if it's a high-profile case, reassure the public by having someone of rank concerned with the investigation say so.
Otherwise, a comment like that is just more bureaucratic babble to be drowned out rather than listened to. It's background government "Mu-zak."
More than likely, they don’t want the drug data to change the focus from the gun data.