No I did not forget that but mainly people are a little more forgiving than you betray. Religion per se is not old fashioned God fearing Christianity and most people are not rednecks but have compassion and understanding in this country. You paint a picture of something pretty much long past apart from in certain sects of the church.
As far as murder is concerned no I have not forgotten and why should I any more than you have but by the same belief Sheila was a very sick woman and therefore was not responsible for her actions unless you believe she brought on her own illness. Even if she did then you are in to a huge debate anyway.
As compassion is the basis of the modern Christian church what is your answer???
Having compassion doesn't eliminate what is considered sinful behavior or eliminate the need to repent. If one has problems so turns to religion it is even less likely they will commit murder. The claim was that maybe she would have delusions about all the victims being the devil but she had no delusions about them even during her relapse. If anything she would have killed Freddie sinc ehe was the one she saw as the devil.
Religion offers hope it doesn't make one suicidal. Depression leads to suicide. Women who commit murder suicide typically kill their kids for one of 2 reasons out of spite so that their spouse can't have them or because they feel their kids will have a touch life without them and they think they are sparing them a hard life of having to be raised in a foster home. Women usually kill themselves when someone they love leaves them or financial problems or something similar that results in severe depression and feleing hopelessness. Those they are responsible to care for tend to be the ones taken with them if they kill others instead of just committing suicide. Killing parents as well is not part of this unless their parents are old and the person committing suicide is the caretaker. They rarely kill the person who is the cause of their problems. The often kill those they are responsible for so that they can't use having responsibilities as an excuse to not kill themselves.
She was not taking care of her parents if anything it was the other way around. Nothing in this case fits the murder suicide paradigm.
Factoring in religion into the matter giving her new hope and a new found relationship with her mother makes it even less likely.
But there is no need to wonder because she can't have shot herself and can't have moved her own body after she was dead. Someone else did it before her blood dried and the only one who would be in a position to do so is her killer.