I just want my baby girl safe. I don't know that he's done anything to her. I only know for sure he's done very ugly things to me. But he also threw away 2 computers during the investigation into her sexual abuse. I feel that I need to keep her safe for now, until we find out what was on the computers and until I have an answer regarding her behavior. Is that being a paranoid parent or reasonable??
The investigators would not be able to tie his throwing away computers with anything related to the investigation if they don't have that little nugget of information about "why" he threw it away. Did they even ask him about it?
If they continue to say something like that after hearing the reason, you may want to ask for another investigator to be assigned. You'd be very reasonable to want to know why an investigator would ignore something like "He threw two computers away during your investigation of him, and deleted much information from the other computer."
Also, you might consider whether those computers never made it to the trash. There's a fair chance that he stashed them in a car trunk, storage unit, attic, or something like this.
Even though it's normal to have feelings that go back and forth between having loving feelings for him that urge you to keep things together, and wanting to never see him again, I hope you'll stay focused on taking care of your daughter. I have some serious reservations about the investigation based on what I've read in your posts. If the police think she doesn't believe
that she was abused, but agree that she learned the behavior from an adult, then I'm worried that the police investigator is NOT a trained sexual assault responder. Normal police investigation tactics often fail to uncover sexual abuse because the victims don't want to hurt someone they love. Remember, they just want the abuse to stop, and when cops get involved, even a 6-year old understands police put people in jail.
The fact that her own acting out involved bribery suggests that she has been approached in a seductive manner rather than through physical force. It would be worthwhile to investigate the "games" adults play with her (and do this without focusing on your husband or the sexual aspects) to gain insight. "Hmm... has anyone ever played Bingo with you? Who played Bingo? Really? Was it fun? Cool! And has anyone played (another couple times with other children's games) and then "Ok, and what was the best treat you ever got for keeping a secret?" This kind of backdoor questioning is far more likely to produce answers than "did your daddy ever touch you down there?" kinds of questions.
It's possible that your husband is not the adult who touched her, but based on what you've written I'm 98% confident that he is.