First time posting here, I think I have read through most of what has been said.
I live close, real close to the crime scenes, and knew several of the Manley family members. I can tell you from personal experience there is NO way DR, CRjr, and FR did not know what was going on the dope. They all lived together in the white trailer prior to DR and family moving to 3122 Union Hill Road. There is also NO way LM was not aware, he spent more than half of his time travelling back and forth from his house to the white trailer (tarps on the roof). The 3122 property has been sitting empty for some time, and yes there are close houses. One being lived in by a friend of CRjr. The other being empty of regular residents to my knowledge as the elderly owners are deceased. The 3122 property was purchased from an elderly couple that have zero connection to the Rhoden family. Bottom line, and while it may not be a reason to wipe out a whole family, these people were all involved in the criminal activity. Don't let CRjr. age fool you.