A tip. Hmmmm. Who would know this? Did ~mommie~ or ~daddy~ dearest get to talk-talk-talking and meth-babble it to someone? Did someone else find the baby -- deceased -- and hide him -- possibly paranoid due to Duane?
I would think that if there is a trial, the tipster would have to testify -- IF the authorities know who the tipster is. Her sister, anonymously?
I think it will be a while before we know more details. Prosecutors & LE don't talk details much when they're facing a grand jury, charges, arrests, etc., etc., etc.