The case is totally messed up so he surely could be involved as with the grandfather/brother. Think those Anthony females have totally been used and abused for a very long time. Even in reverse speech she says she is not the despot, the boys are involved, usually family members call the men "the boys"

Something did happen and I feel she was told to shut up when perhaps she might have spoken up. I think that there are others issues that were maybe being covered up and time was the answer to that happening (I do not think the daughter knew or does know all of it either but may now have figured alot of it out)

I think males are involved in this death, not just the daughter, perhaps she was threatened to keep quiet or else. Perhaps being in jail might be saving her life also.