IMO the Adam conversation is actually fortunate, because Adam is known, not a mystery, and he has been interviewed by the police.
Therefore, IMO we don't even need to expend our energy in speculating about what "I told Adam everything" could possibly mean.
Adam is right there to explain it.
Whether Adam tells the truth, the whole truth and nothing but the truth is for LE to figure out, but just for me personally, there are many others things which mystify me more and about which we still are speculating wildly.
Jmo