MB is no longer with us, so it seems unlikely he's been in contact with Amanda lately, although, I suppose it's possible.
Well .. she did consult a psychic .. so he could have used that medium
All kidding aside .. I was working off the assumption that these calls were (could have been) taped before his accident and LE was JUST NOW interested in listening to them.
I was under the belief that most of the info she had was not "current" rather "old" info from last year but that she just recently went to the Patriot News because she recently learned that the lake was never searched.