He recognizes the Sandevistan on video and notices that, unlike the previous owner, David is not suffering from cyberpsychosis.
Perhaps it would be useful to bring him in as a tester.
On the Subway, David catches Lucy stealing chips from the passengers.
We open on a cyberpsycho slaughtering cops. His enhanced spine gives him outrageous reflexes and speed, but even that can't save him when police hackers disable his systems. The cops provide enough firepower to get past his defenses and kill him.