None of the above.
Allow me to remind you of your comment:
"If none of the Moorman family seeks to take part in or objects to the petition, they are -- in essence -- acquiescing to the guardianship.
Indeed, this is the perfect opportunity to call Barry as a witness in a hearing, under oath, to answer questions. If the Moorman family doesn't involve itself in the guardianship proceeding, then I will wonder how strong their suspicions of Barry really are."
If the family choses not to involve themselves --it could be because they may have fear of reprisal.
Contemporary English definition of Fear of Reprisal: "Something violent or harmful which you do to punish someone for something bad they have done to you... revenge, retaliation They didn't tell the police for fear of reprisal."
Edit: And as Truecolors pointed out this family member believes that he killed their loved one, they’d be justified in being cautious. Don’t poke the bear, as they say.