This is my understanding from past research when we discussed it in the past.
Where I see that (prosecution) happening is if there was proof that FW allowed the murder items and stolen items to be hidden on her personal property ..ie...in the lake.
This would be Obstruction of Justice.
It is not a crime if she knew what her spawn had done and said nothing. What is a crime is if she did anything to hinder the investigation.
For example;
1.) Lied to investigators and they can prove it
2.) Lied to the GJ and they can prove it
3.) Found out murder items were hidden on her property and she allowed it and kept it a secret
This is murky water and I would have to do more research but there is a difference between a killer telling you he buried murder evidence on John Doe's property and you don't say anything, and the killer telling you he sunk murder evidence under the goose house on your pond and you don't say anything.
By allowing a killer to keep hidden evidence on your property you are specifically helping him to avoid arrest and that is Obstruction of Justice.
4.) Deleted incriminating conversations from any electronic devices during the investigation
5.) Hid or concealed anything that would have helped in the investigation.
6.) Gave money to help suspects avoid detection
7.) Influenced GJ testimony of witnesses or in any other way tried to influence things witnesses would say to LE.
8.) Anything to help hinder the investigation by "misleading conduct"
One particularly murky category of obstruction is the use of "misleading conduct" toward another person for the purpose of obstructing justice. "Misleading conduct" may consist of deliberate lies or "material omissions" (leaving out facts which are crucial to a case). It may also include knowingly submitting or inviting a judge or jury to rely on false or misleading physical evidence, such as documents, maps, photographs or other objects. Any other "trick, scheme, or device with intent to mislead" may constitute a "misleading conduct" form of obstruction. Firs
Generally, any act that is intended to interfere with the administration of justice may constitute obstruction of justice. There are many different kinds of obstruction of justice that are covered by different federal and state statutes. For example, separate federal statutes cover obstruction...
www.ohiobar.org