I am finding these statement by the mother incredible (not in a bad way), and they make me wonder. We know the prosecutor has been in touch with the family and is allowed to discuss certain things with them. I almost wonder if in her discussions with the family she has told them off the record that it may be very tough for her to get a conviction. That might explain some of the statements by the mother.
BTW, thanks for the link to the affidavit.
I imagine the mother has been hearing a lot of the discussions. That is something that she, I am sure, struggles to prepare herself for.