Not the back room of MacGuffin's, but the Employees Only room at Good Deals next door. Use the toy robot at the camera to keep the lights on.
a baseball card
He is out to steal a rare baseball card from Slugger's Keepsakes.
The thief drops the key in MacGuffin's but it doesn't fit the back door there. Go next door to Good Deals and try that door. You will need to use the toy robot to keep the lights on.
The rare Honus Wagner baseball card from the safe at Slugger's Keepsakes.
There are no coins used on Night watch island.
night watch island
you use it to open the new store to catch the thief on night watch island the security guard tells you it's hidden behind the employee of the month portrait
Back Lot Island (April 2013)
After he knocks you down in the Carnival Costumes store, go to MacGuffin's and hide there. When he enters, you can surprise him. He gets away, but drops a key marked 'back room.'
When you have to break into the empty store, Gus tells you there is a blowtorch in the manager's office (behind the plaque). Use it on the padlock, then follow the thief when he goes into the ceiling. You can use the blowtorch as you pursue him through the vents.
The password to the scooter is "frost."
FROST