He might not have been "the murderer," but settling with the 2 families of the victims after the fact colors him pretty guilty to me. He knows more than he's let on, and deserves scorn.
But trial testimony was consistent in the following:
1) Lewis didn't start the fight
2) He initially separated his friend and tried to get them in the car
3) His friend was hit over the head with a bottle by one of the victims
4) Lewis was never seen with a weapon, only pushing and shoving with the second victim.
Does that make him completely innocent? No. But the judge was pretty harsh with the prosecutors.
The settlement? Plaintiffs aren't going to go away and there's no opportunity to plead to a lesser charge. The whole incident was going to be replayed well after it happened. It was probably worth that much to Lewis just to avoid it.
He deserves scorn for trying to cover for two people who committed manslaughter, were charged with murder by an egotistical weasel of a prosecutor, and ended up being acquitted.