I am not as generous as you Betty. AW's mother was ONLY charged with forging custody documents and then the whole line of people who could have gained custody or even visitation rights are murdered and she knew nothing about that? It didn't pique her interest?
I suspect there's more to these murders than what the public is being told. Grand juries are guided by prosecutors and the evidence they present, though. FW probably knew more than is alleged and the motive may have included more than just custody. It will be interesting to see whether more information comes out as these cases proceed through court.
I keep going back to all the things LE said publicly about this case and the threatening messages they kept sending to locals to come forward with information. The way they discouraged anyone offering reward money. All the implications about the local drug trade, etc. If they thought these murders were planned and carried out only by the clannish Wagners and only for custody reasons, why would they think others knew so much about it? Why did they think so many other people in the area were withholding information? As charged, these murders wouldn't have involved others outside the family. So why the threats? So, yeah, it's possible Fredericka knew a lot more and possibly played a more active role, JMO.