Maybe it's just me. If I thought a family member was guilty, I'd cooperate. Out of fear that if he was released, another innocent person could die.
Of course you'd cooperate. What I think is good in this particular case is that although the media has talked to some, it looks like anyone who really knows anything is talking to the authorities and being very discreet.
IMO A spoiled child raised with NO parenting.
* Not to mention the proported drug use and relationships with minor girls that he was never held accountable on.