Me wonders...if you are a kid and one parent murdered the other...would you still want to protect the one that survived? Maybe the surviver was the one they loved more or had cared for them more.
In his defence they are saying that he had a back problem and couldn't possibly have dragged her around by himself...maybe there was another party helping, the one in the two cars...
But the youngest said that he was with her until she went to sleep at 10.00pm and the older one came home at around 10.45 - 11.00PM?
they have his back with their stories...