I obviously don't know as much about the case as you do, but it seems the lies were to cover up that for which they knew they'd get raked over the coals for: drugs and sex. Or maybe they are still hiding something?
Nice to have someone else up late to talk to.
I'm in a different time zone.
Well, let me help.
Lies or changing stories about the alarm lights
which doors were found open downstairs
Whether the kids doors were open or closed
whether Brenda went upstairs with Barb the first time
Whether the dog could bark
Whether Brenda danced with DW
Whether Brenda knew DW by name or just by face
While selling GS cookies, whether the kids ran free in DW's house or not
Whether Brenda invited strangers back to her house after Dad's closed
whether the PJ's the grandma had held up for the press were Danielle's or an 'identical' pair kept for the neighbor girl to use
When they left the bar
When they got home
When the partiers left the VD home
When they went to bed
And this is the short list.