I try very hard not to have tunnel vision, but when someone flat out lies about when they last saw a missing person, especially a loved one, it's just incredibly hard to get past that. WH didn't forget that he saw AJ around noon on the 2nd, and he didn't just suddenly remember the meeting after a week of repeating that she was last seen at 7am. He lied. Now you can doctor that up however you like, but the facts are the facts...and in this case, the fact is, HE LIED.
Add to that the past history (that everyone is supposed to just forget, because, hey it's in the past), and I'm really sorry, but WH is where my eyes automatically go.