The difference between this and Christian Bale is that was an independent act which Bale was absolutely no part of. If Jack Russell issues an apology for something he shouldn't apologize for it could be construed as guilt and open himself up to further lawsuits. I'm sure insurance and lawyers were talking to him immediately advising him of the situation. Has a human, could he apologize and make some people feel better, yes. Will it change anything and in the long run is it in his best interest, no.

I'm sure if he's got any guilt he may have tried to make peace his own way. He and Kendall have been through many therapy sessions in their years because of this. But neither one owe anyone an apology because it was an unfortunate accident because of others neglegence.