Seems like DB and JA had a different sort of relationship. I'd lay money he actually was in a relationship with as her supervisor and she pegged him as having something of substance to give her, shelter, power, money, something. Then when they bought the house, it was easy and pleasant enough, so she stayed, but they had a bedroom together and seperate bedrooms. I realize all relationships get to define their own boundaries, but this is noteworthy to me, knowing what comes later.
DA was well spoken, and I don't get the feeling he was totally lying, but he definately came across as protective of her. I get the feeling that he has fallen for the defense story hook line and sinker, that the Jodi he knew may have had some issues (which he won't cop to in any striagh foward way) but she would've never killed someone in cold blood.