I agree to a certain extent, but not in this case.
First Ersland said he shot Parker the additional five times on his way out chasing Ingram.
If that had been true, IMO we would not be here, because any reasonable person could conclude that all those shots were fired in self-defense.
But then Ersland changed his story to Parker moving and making noises on the floor after just the first shot, so he had to shoot him again to protect himself.
Those are two wildly varying accounts, and given that the surveillance video clearly showed the first one wasn't true, I think Ersland then had to come up with a story by which he could claim self-defense. Which to me is a very specifically telling lie that does indicate consciousness of guilt.
For the record, I have no sympathy for Parker; if you are killed while attempting a violent crime, too bad, so sad, you made a choice that didn't turn out so well for you.
On the other hand, I don't believe in vigilante justice either. Not saying that's necessarily what I think happened here; I just don't know.
Barring more evidence than what we've seen, I think that jury will have a tough decision to make.