I'm a fence sitter as well - I don't want to think poorly of the family OR of LE. That said, just because there's nothing bad about LE in the news or in rumors, does not mean that there may not be issues. With my job, I've seen LE who have skirted the line, or behaved unethical, without hearing anything prior - or even come from the issue.
That same skepticism can go towards the family. Some families can appear very happy and loving - with no idea what goes on behind closed doors. I'm sitting on the fence with this one. I'd love to believe the best of both parties, but I'll also acknowledge its totally possible LE has botched this or the family is at fault.
I'm right here with you on both counts.
Is the FBI and other agencies involved? The more agencies that are working together on a case like this, the more I would be leaning toward LE making sure their I's are dotted and there T's are crossed before publicly announcing the mom is a person of interest.