But... if you found the front door open in the middle of the night, you'd probably check on your babies, right after you closed the door, right? Not that you'd be a bad parent if you didn't, but it would probably be hard to fall asleep until you checked, right?
Yes, I would check if I found a door open. But maybe not, if my judgement was impaired by alcohol.
There were definitely some poor choices made, that 20-20 hindsight will haunt Danielle's parents forever. AND that is the case in the death of any child. BUT that doesn't make the VD's criminally or morally culpable in the death of their daughter.
Being a parent doesn't make one omnicient (although you should let your kids believe this for as long as possible). Those parent's had no way of knowing that evil stalked their neighborhood, waiting for opportunity.
I am not putting any stock into the lifestyle allegations until a verified LE source confirms them.
Especially if one of your children was known to be a sleepwalker, as Danielle was said to be.