I haven't seen the Ashley Banfield episode yet, but, if video from outside shows Crystal wearing a black dress, why does the boyfriend insist it was pink or purple? It might make sense if it was the other way around and the outdoor photo showed it was pink, but 'infrared distortion' or whatever, in daylight?
Still seems like 2 different outfits to me. Especially the black one certainly appearing to have sleeves.
As far as introducing the kids to the boyfriend on the cruise goes, I think it's a terrible idea. What if the kids don't like him? What if they are uncomfortable meeting someone they might think is supposed to be 'new daddy'? They can't just get up and go home. They're stuck for a few days, maybe a week. A family dinner would have been much more reasonable. Especially since it's been revealed the the ex, their father was originally supposed to go on the trip. I think that would only reinforce the 'new daddy' idea to the kids. Springing a stranger on the kids, on a boat where they can't just go home, and you don't know what their reaction will be, is a terrible terrible ideas to me
As far as compromised evidence goes, how did 'the family' find the car before police did? That seems odd, unless you know where to look. It's very unlikely to drive around and just happen upon it.
And even if you did, why would you go through the car when there could be fingerprints from a potential perp? That makes no sense at all.