He says he has already began making enquiries about the ambush to find the person responsible, but he stresses that these things take time. Cortez introduces himself and his daughter, Mercedes. Walk into the pink marker at the pier to trigger a cutscene. First, go to Rafael's and get a chance of clothes. Ken wants you to go to the party and represent him, and see if you can find out anything about the ambush. He is hosting a party which will be attended by all of Vice City's big players, and Ken is invited. His name is Colonel Juan Garcia Cortez, and he owns an expensive yacht in Ocean Beach. In order to determine who was responsible for the ambush, Rosenberg suggests meeting with the person who helped him set up the deal.