While the ultimate punishment was the death of their child, I have to ask, what would you have them charged with and what evidence would you present? The evidence has to be verifiable of course. (just so you don't misunderstand me, I'm not being sarcastic at all..)
I can see someone would want to put them on trial for swinging, but it's not illegal. I have to wonder, if they could even prove it. The swapping partners with friends (disgusting as it is) isn't the same as the professional regular participation in swinging that has been discussed at length these threads. Is there evidence or witnesses?
It is called neglect.
You and I are on different sides, I do not believe David killed Danielle.
I believe someone they brought home that night did.
They could not prove in a court of law how David got into the house
they just believed he did.
The palm print on the hall wall out side Danielle's bedroom door.
Not identified.
Finger prints in her room.
Not identified
DNA mixed with Danielle's in her bed.
Not identified.
You identify the prints and DNA I say you probably got your killer.
It was not David.