@jonnythan Said
I'm certainly no expert on the subject, but my understanding is that sharks apparently do not view human beings on the surface as natural prey; as a result, the majority of shark attacks on humans can be attributed to the shark thinking the human may be another animal such as a seal or desperation from hunger. However, once a shark does attack and/or eat human flesh, the shark may be much more likely to attack humans again.
Therefore, since there's the distinct possibility that this particular shark is much more likely to attack another human now that it has already done it once, it's simply too dangerous to allow it to live in the wild. Capture it and put it in an aquarium or something if you want to, but it shouldn't be allowed to continue predating those waters.
Any shark attack on a human is accidental. Sharks do not enjoy the taste of human flesh. Sharks often mistake surfers for seals based on their appearance from underwater, especially with the two legs hanging down.
Sharks do not develop an acquired taste for human flesh, this is very unattractive to sharks.
As I stated earlier on this thread, there are a few very basic rules to follow to avoid a shark attack if one insists on entering the shark's territory. Of course, arrogance prevents many people following those rules, as with most things involving dominance over other animals.
I don't believe there is any certainty over which particular shark attacked this man, how would you suggest catching "it"?