You already know Maria Torres, she's standing at a square near the airport . She wants you to kill someone - go to him .
You will see the target along with some guards . Just use your sniper rifle to kill him  and run from the police afterwards. You will get an Xxxxx swing.
Jaime Agassiz  is standing near the police station - at the side of a building .
He wants you to blow up one of the buildings . Do it  even if you own the place - after a couple of hours it will be rebuilt and you will get the possibility to frame on of Almeida's men.
Juan-Pablo del Monte  is standing before the place where the game begun .
He wants you to bear someone  - go to the place . Bribe the nearby policeman and beat the target afterwards. You will get a possibility to get one of your men out, in case he gets caught by the police.