Play the "Casino" level and start killing people. Allow yourself to be spotted up to two times, then kill a cop to get the attention of the FBI. When there are between eight to ten people remaining, kill someone and allow yourself to be seen. Once the police arrive, run up to the stage, stand next to the swinging cable, and repeatedly press [Trap]. If timed correctly, the cop will die and the FBI will appear. Kill the remaining guests without running into them. Note: You can use any type of trap to kill the officer, as well as the gumball machine next to the kitchen.