If you can't find anything, then it sounds like you are taking this either out of context, or too far, or maybe even both.
Certainly you are
going too far in your pursuit of this. It sounds as if you flat out do not trust him and refuse to do so. You are then running everything through that filter and taking the stance of just not having found the evidence "yet".
I can't tell you any specific action or comment that any given guy will take in such a situation, but I can tell you that perhaps you're better off just leaving and finding someone you feel you can trust, because this one is on the road to destruction. It's no basis for a good relationship. And remember the Judas Priest back-masking trial. Often, if you look hard enough for something you will find it, even if it's not actually there.