Do you know how long he had been living there? Dunno--he could have lied to her about reporting his change of address, or she didn't know any better.
I could be wrong but from what I understand, he was living there and she lied to police about it. I don't know how long he had been living there but if he did lie to her about reporting the change of address, why would she hide that he was living there? I'll try to find the article where I read that she lied about it and post it.
Here's the lihnk!!
http://www.abcactionnews.com/stories/2005/03/050316interest.shtml