I hear what you are saying, family should look out for one another. But I think Dr. Burns had pegged DM as a problem child very early on. DM even lived with his family for some time when he was younger. I personally respect his characterization of DM because he was the only one whole seemed to face the truth and was honest about it. Everyone else was in denial and completely negligent. As we now see, that didn’t help anything.
I don't think anybody would think that Burns has an obligation to look out for Millard at this point, but the over-the-top contempt is self serving to me. I had the same impression at the TB trial. He seemed furious and put out that he had been dragged into any of it and seemed to be taking absurd pains to let everybody know how much he hated his "technical" nephew. There was no trace of sadness or regret at the path his nephew had taken, only concern that he not be tainted by it. Certainly there is no concern for his sister's feelings, calling her only child's life useless and his thoughts drivel on the very public record. 2002 is when he stopped seeing DM for "altruistic reasons", as he previously described their relationship when DM was between 15-17. Asked about being at Maple Gate in 2012 he actually starts making a rather grandiose statement about not being involved in this tragic and diabolical affair. That's bizzarely egocentric. I understand Burns' feelings. I don't understand his corresponding lack of feelings, or his failure to reign it in and be a serious and sober witness. The best way to honour and serve the people lost in these tragedies is not likely to be acting in a way that gets you admonished from the judge. Witnesses who have been this contemptuous of the process and this self concerned in the past have rightly gotten panned by our peanut gallery. This guy gets cheered on? Ugh. The principle remains they same no matter who is testifying.
The overall impression I have had since the TB trial is that the narcissistic and self-absorbed DM didn't fall far from the narcissistic and self-absorbed family tree.