There are few characters in the Spider-Man family with a more complicated history than Ben Reilly. Created as a clone of Peter Parker in a key storyline in the 1970s, he was quickly killed off — or so readers believed at the time. In the 1990s, he returned, with the controversial revelation that Spider-Man had actually been the clone for all those years. This was later retconned, of course, and the clone took the name of Ben Reilly, who had apparently survived and taken a new identity. He even took up his own superhero persona, the Scarlet Spider.
In the 2000s, in a conflict with a third clone named Kaine, Reilly was killed, but because this is comics — where nobody stays dead forever — he came back once more not long after. But this time, his return was not a secret survival, but a resurrection by the Jackal, and the Prowler played a key part in bringing him back from the dead. This version of the Prowler, however, wasn't Aaron Davis, but a clone of Hobie Brown, who the Jackal had created to serve as his henchman alongside Electro.
In the story, though, the clone of Hobie — like the real one — switches sides and aids Peter Parker and a clone of Jean DeWolff. In the end, this clone of the Prowler was found to be imperfect, and before his body could give out on him, he sacrificed his life to help stop Electro.