Myself or my Id? A Short Story from the Future

Darcy mooched in the shop doorway, glumly scanning the street and nearby store for money wallets. The only interesting thing his RFID scanner had picked up was a young lady wearing expensive designer clothes, with what appeared to cheap jewellery. He watched the scanner as people moved about the street hoping for unguarded ID that he could filch.
He moved, peering into the store. Someone had started a monetary transaction. His modified Travinetter caught the identifying keys of the transaction, and flashed up that they were stored along with the target’s ID signatures.  He activated the Travinetter, inserting his biometric data in place of the targets, but keeping the bank account references. It would be a simple matter to enter the store, and buy an item with the replicated ID.
The interesting young lady passed him again. He checked, and rechecked his Travinetter. The jewellery she was wearing looked similar, but was transmitting the ID of a much more expensive make. Intrigued, he decided to follow the lady. Perhaps she would perform the trick again?
As they approached the outskirts of the town, the lady turned around and smiled at him. He stopped, and then realised that someone was holding on to him from behind. The smile got bigger. A Cheshire cat he thought. “Scan him” she commanded, pointing over his shoulder. Darcy scanned the man who was gripping him. The results made him look twice. “Well” the lady demanded.
“Not well at all.” Darcy replied. “IDINFO is there, but the person is dead?”
Darcy felt something penetrate his skin, and a sharp pain. The body behind him spoke. “You like nicking ID mate?” Darcy could see the world turning dark. The body spoke again. “Well, I do too. I nicked the wrong one last time, but I think this is the last time you nick an ID.”
Darcy’s grip on the world receded. He felt he was leaving his body, or was it his Id leaving his body? The new Darcy kissed his companion, feeling a boost to his ego as he did so.