Well it's better than the last link, but a lot of the elements that
could make this a bad example weren't really addressed in the fictitious story. To be precise in knowing, we'd need to know the manner in which the marines stopped the thief, whether or not it was felony theft (depends on thief's criminal record), whether or not it was felony assault (probably not), felony battery (probably not, stabbing notwithstanding) details of the fight, etc. If the marines followed the thief as much as Wise did in your example there would be a stronger case against the marines. And a
much stronger case if we suppose there were no knife and the thief only tried to "to take a swing at" them.
If there were no felony commit initially by the thief I'd still say there is a low chance of prosecution of the marines given the circumstances I stated somewhere else, though prosecution is very possible (as shown in your example). Still, in this case both parties would still be charges as stabbing is likely felony battery. For those of you that started this discussion, note that I doubt the charges on the marines would be for excessive violence in self-defense, but for whatever mistakenly citizens arresting someone is in Georgia. (there is no duty to retreat in Georgia IIRC)
With that, I can safely say we've exceeded what the story can do for us.

Let's hope I don't edit-storm this post, too.