Another explanation that has been discussed is Saved By The Cross.
Ramsey's referred to themselves as a "good Christian family" and even their priest (Rev. Hoverstock) was invited by Mrs Fernie to be with them in the morning when JB was found. Patsy was seen praying to God and Jesus that morning. So if they knew that she was dead and soon to be found in the house, they may have wanted the priest to be there when it happened to make it more "appropriate" when she was found. Would they have invited a reverend over, if they knew that it really was only a kidnapping?
When John carried her body up the basement stairs and placed her on the floor, he stroked her hair and called her "my little angel". Then Patsy went to see her with Rev. Hoverstock. They all were in a circle around her body and the reverend laid them to recite a prayer. After that Patsy asked for Lazarus to raise JB from dead.
By reading those statements it does seems that this part of Christianity was important to them that morning. So "Saved By The Cross" goes along with that theory - not killed and murdered, but saved and in heaven now.
Personally, I think Saved by the Cross is a very likely meaning. PR was big on using acronyms and I think that would have been particularly meaningful to her.
PR claimed to have been healed from her cancer by Divine Intervention. PR had a tendency towards the dramatic. She leaned into Christian symbolism. She didn't just "ask" for Lazarus to raise JB from the dead, she was pleading from a state of apparent hysteria. Hearing it described by those who were there it presents as very theatrical and dramatic, very PR.
When one looks at the entire scene that occurred from the moment that JR found JB's body, it's interesting to note PR's behavior. She was in the den lying on the couch, with Barb Fernie and Priscilla White tending to her. Rev. Hoverstock was in the kitchen heating up something to drink. JR recounts that he screamed, and we know that FW ran upstairs shouting that they had found her, calling for an ambulance, asking for someone to call 911. He runs into the den and attempts that call himself, then runs back towards the stairs to the basement. Everyone in the house moves towards the stairs, anxious that she has been found and no doubt wondering about her condition which IMO is a natural response to what is going on. But there is one person who does not move at all, and that is PR. Her missing child has been found, her condition unknown, it's still possible for anyone there at that point to think that she may have been alive, but PR doesn't move from the couch. She is the only one left sitting in the den.
JR brings JB up from the basement and places her on the floor. Linda Arndt then moves her to a spot on the carpet near the Christmas tree. She and JR have their moment over JB's body where she tells him that she's dead. JR then goes and gets a blanket to cover her. Someone else gets a sweatshirt and places that to cover her bare feet. BF and PW at some point go back into the den to tend to PR who is still inexplicably sitting on the couch. How many minutes have passed now? PR finally starts to get up, supported by BF and PW as if she can barely walk on her own. The trio slowly moves into the room where the body is. As they near JB's body, PR is able to run unassisted to the body where she throws herself onto JB as she is wailing. And at some point raises her hands in the air as she wails for Lazarus to raise JB from the dead.
Now, call me skeptical but this sure reads like something out of a choreographed play. She waited so she could make her entrance and the theatrics ensued with all eyes on her, witnesses to the grief she wanted (needed?) everyone to see. I think she put SBTC in the note because Saved by the Cross was something she needed to believe for JB in order to live with what had happened, which IMO she played a role in. The belief that she was in Heaven with God / Jesus, lifted up and "saved" from her suffering that she had endured that night.
Victory. That's the only way PR could go on.
I do want to express that this does not mean I think her grief wasn't real, or that she was faking it. I'm sure it was real. However the display she put on feels exactly like just that....a display she felt was needed to sell what she and JR were selling.....that they had no knowledge of what had happened and it was done by some "creature" as I think JR has referenced in interviews. She was caught earlier in the day watching the police who were still there through the splayed fingers of her hands, observing how they were assessing the scene, watching how they were acting and what they were observing, what she could glean from their demeanor and reactions.
Years later when PR herself passed from the return of the cancer, her sister Pam said this: "She's gone. She got her
Victory at 3 o'clock in the morning on Saturday".