Thanks for this post as I also read all 98 pages of 2nd interrogation, and I observed the following about "fire" and "cremation."
Detectives were attempting to go over the BSR's timeline from birth to burial, when they started interjecting how scientific evidence indicated to them that she did not previously tell them everything that happened before burying the infant.
When detectives first bring up the concept of burning the baby in a "fire," BSR appears shocked, and immediately willing to swear on everything, that there was NO FIRE! She's adamant she would remember a fire.
Later - when detectives bring up "cremation," it was almost like BSR did not associate "fire" with cremation, and she's the one that brings up using a lighter (not a fire) to ignite a bag. She also tells her dad that she cremated her baby-- just a little.
I really need to watch video of this part of the interrogation to view BSR's body language when she makes statements about cremation as it's very perplexing to me. I really wish BSR would have been polygraphed about anything related to "burning." MOO