You've got a new boss in the form of Diaz - follow the D on your map to Starfish Island, and his palatial estate. Someone's screwing him out of 3%, and it's up to you to find out where the cash is stashed. Follow the pink marker, pilfering Diaz's Infernus if the whim takes you, until you reach the thief's apartment block.
Check the window when prompted, then run after him to the roof. It's a good idea to scout this route before activating the last checkpoint, to make sure where all ramps and planks are, but it's entirely optional.
There's a puny Faggio waiting for you at the end. You can park your car in advance, but don't park it too close to the building because when you get back to this spot it will disappear. A good spot to park is on the other side of the street. Basically he runs across the rooftops, stopping to shooting the barrels about third quarter of the way along (tread carefully to avoid being set on fire), then he jumps off at the end, gets in his BF Injection and you need to chase him all the way to a mansion in Prawn Island.
Stay far enough back so that you're out of range of his rifle, but don't lose track of him. All you have to do is to wait for him until he runs inside to pick up Diaz's money.
A very valuable tip is to outrun him and wait for him to get picked up. As soon the BF Injection shows up, jack the vehicle and drive a bit blocking the driver's seat so you don't get jacked back. If everything goes well, the thief will board the passenger seat and you'll be able to drive him around. To complete the mission just drive to the Prawn Island mansion.
In order to complete the mission the player must:
- Go to the thief's house and find out where he's stashing the money
- Have a look through his window
- He's escaped to the roof, keep on his tail but don't kill him
- Quick! Grab some wheels and follow him