How do you get the thief to crash on night watch island?

Go to the manager's office and get the spare scooter. The password is "frost." Run to MacGuffin's to get the Quick Charger and charge the scooter battery. Drive the scooter down the escalator and to the left side of the mall atrium (you may have to leave the atrium and come back to get the stolen cart to reappear). Go up the left escalator to the top and wait for the cart. Chase it back down and it will crash at the fountain. But the driver is one of the test dummies. Go to the Printfax store to seek a clue.