No, I dont say, if IDI, we can presume that the Ramseys did not know anything about any of it.
Independent of position, Im presenting reasons why they might say that they did not know anything about it. For example, they might truly not know anything it and maybe AFTER a considerable period of time and consideration none of the explanations made sense to them or seemed believable to them. Perhaps, over that period of time they even considered that the pineapple might be related to the murder, that an intruder was somehow responsible for it. Why not? Lots of people have considered it.
AK
Anti-K,
If IDI the parents need not know anything about the pineapple snack.
If RDI the parents need not know anything about the pineapple snack.
The latter is consistent with BDI and BR being airbrushed from the case on legal terms due to his age.
.