2 people were killed swimming off the same beach, less than 2 weeks apart. Sharks are very territorial - the chances of it being 2 separate sharks (especially given how rare sharks that attack humans are) are miniscule.
As I stated, sharks are territorial - it will likely be in the same area and will respond to standard bait. The injuries on the dead man will give a very good indication of its size, so if a small/larger shark is caught it can be freed.
Hooper, is that you?
Well, this is not a boat accident! And it wasn't any propeller; and it wasn't any coral reef; and it wasn't Jack the Ripper! It was a shark