Obviously RL thought Brain was capable of needing a file for a jail break and help with a body or she wouldn’t have written that in her love letter.
I could see emoting I would cross the highest mountains, swim across the deepest seas, but stating she would break him out of jail or help dispose of a body for him wouldn’t cross my mind in any kind of letter to my son.
No wonder Brian saved the letter and kept it with him to the end.
It was his document of salvation for
anything he did.
[…]
When Brian Laundrie’s body was found in October 2021, investigators discovered an undated letter from his mother in his backpack enclosed in an envelope that said, “burn after reading,” CNN has reported.
[…]
When she decided to write the note, Roberta Laundrie was under the impression Brian and Gabby were just driving up to New York, but she suspected they would be gone for much longer. She and her son had recently had an issue over his traveling, and she was disappointed they would be gone so long, so she wrote it to remind him she would always love him, the mother said.
She said she wrote “burn after reading” as a reference to a book Petito had given her son.
[…]
Brian Laundrie’s parents detail conversations with their son who told them Gabby Petito was 'gone'
Of course Gabby is the one that gave her the idea of burn after reading because of a book Gabby gave to BL.
The book is a journal “Burn after Writing”
Burn After Writing - by Sharon Jones (Paperback)
Roberta Laundrie says she wants everyone to read the whole letter, bless her heart, she thinks it makes more sense in its entirety:
https://www.wfla.com/news/sarasota-county/burn-after-reading-letter-brian-laundries-mother-offered-shovel-garbage-bags-to-dispose-of-body-if-needed/#:~:text=Roberta said in the affidavit,that contained the letter to
all imo