There are so many angles and we've got a long way to go before we get all the files. At this point, I don't think that Melvin is confessing just for attention. Something else is going on with him.
I was re-reading the evidence docs and just realized that Nicole's visits to the office were very late at night and on that visit she made to Rick, it showed the time she entered, but there was no time listed for when she left. That's curious. We don't know how long she stayed. I'm wondering if she actually left with Rick.
I think I'm going to have to start printing out all these docs, so I can study them when I'm sitting here at the computer.