Cleared out the silver store, broke into the diamond store, then it sounded like the police were on their way so I escaped with 12,066 in my swag bag.
Nice game. Will give it another go and see how much further I can get. Knowing me I probably attempted the shops in the wrong order!
Btw found a small bug: the game countdown continues even on the game-over screen - just swapped back to the game and I had been arrested :)