. . . of this case is that the DA testified two hours before the grand jury before that grand jury decided to indict him.
Grand juries are weird in our judicial process. They are secret. They are controlled by the prosecutor. A defendant has the right to refuse to testify before a grand jury but if he wants to, his lawyer can't be present. Doesn't sound very fair, does it? (I know a little bit about them since I ran one for eight years here in Wise County.)
But it's interesting that the Rockwall DA chose to testify. I suspect, and I'd be guilty of this, that he had seen how some grand juries will cut a guy a break if extenuating circumstances are present even if he were technically guilty. They aren't supposed to, but they do. So I bet, being a bit full of himself, that he thought he could go tell his "story" and they'd let him go. Didn't happen.