Dennis Carradine was a small-time crook and gun dealer who was now wanted for murder, owning an unregistered gun and robbery. Dennis was killed by the serial killer Cletus Kassady.
Peter was in a convenience store trying to buy some chocolate milk, he didn't have enough change so had to leave it, a man with sunglasses behind Peter in the queue knocked something over, to distract the store clerk, then stole the money from the till before throwing the drink to Peter. The man then ran off, pursued by the Store Clerk who asked for Peter's help to catch him. Peter refused due to the owner's greed and the thief ran into Ben Parker, who tried to stop him from picking up his gun. The thief managed to grab his gun and shot Ben in the chest, the thief then ran off, and Ben died almost instantly.
Peter then listens to crime reports and follows any that sound like the cash register thief. He locates and apprehends many criminals who fit the description, but none of them have a tattoo on their wrist.
Even after the death of Captain Stacy, he is still wanted by the police.
Video Game Continuity
While in the film continuity it's not known if Peter is still looking for him, in the game the first few missions involve Spider-Man looking for the Cash Register Thief, named in the game as Dennis Carradine. Eventually, Spider-Man finds him dead in a back alley, having been murdered by Cletus Kasady.
- In the comics, the man who murdered Ben Parker was simply known as the Burglar.
- In in the 2014 video game, The Amazing Spider-Man 2, Peter Parker learns the Cash Register Thief's name is Dennis Carradine and that he is a gun dealer in NYC. Peter as Spider-Man tracked down Carradine, but he was killed by Cletus Kassady.