I think the assembly was based on collective asumption. Active investigation, they needed info fast so everybody came to the table. And that might have been fine if the defendant was blindsided by FD's actions. If she sang like a lark, the various detectives would have spun out of the room with each bit of Intel received.
Such was not to be the case. The minute she contradicted facts as LE had already gathered them, they should have pivoted. Get the likes of Grusing in there to crowbar it out of her with butter.
Or good cop, bad cop. Play to her sense of motherhood? Wasted. Should've played to her sense of entitlement. Or sense of hatred for JFd. Sympathize. Lean in close, play into her currency.
But honestly even her own attorney thought he knew her, thought at most she was an unwitting element.
She is easy for tampering and hindrance.
Conspiracy comes with the planning. Awareness of a crime before one even occurs. Sure, doesn't everyone use somebody else's phone at an agreed upon time, answering a call and then set out on a morning of alibi building, ridiculous selfie and all?
Bring on Interview #3!
JMO