I don't know about US laws, but in most countries agencies/PMs/experts or whoever has access and is involved in the investigation, cannot make a comment if the investigation is ongoing.

Breaching of this, especially as you're making a case, in most cases at best would invalidate the whole case + bring disciplinary actions upon the individual(s) that committed the breach.

Judging by the other comments, looks similar for the US too.

If you're ever partecipated as expert in any investigation or news article you'd know you'd get usually biased hypothesis, if otherwise it meant you wouldn't have the same impact for the news story. Or if you've ever heard of the Gell-Mann amnesia effect.