Smackdown (GTA IV)
Smackdown is the first mission that Niko does for Derrick Mcreary, one of the Mcreary brothers. In this mission Derrick asks Niko to kill one of his War mates, Bucky Sligo.
When you meet Derrick at the park in Acter,Alderney, he's all drugged up on alchohol. It takes a while for him to explain that he's got a problem. One of his War buddies, Bucky Sligo who was busted into prison by Derrick is now blackmailing him, threatning to kill his family. Derrick decides to end this, so he asks Niko to kill him.
In order to find Bucky's whereabouts you'll need to get a police computer, which means to grab a police car. Should be easy, there are two Police cars parked near your location. Steal it and type in Bucky's name. It'll tell you that he hangs out at the Burger Shot in Westdyke. Drive to the restaurant. When Niko turns on the sirens Bucky is frightened. He escapes in his Contender back to his hideout. It's one of those Ronin-style chases again! He's gonna smash through fences and dodge through traffic. He must be real dumb, as his hideout is only a couple of blocks away! Don't worry in chasing after him, as his driving sucks! When he reaches his hideout in Owl Creek Avenue, he'll start shooting. Get a shotgun or machine rifle, and take out his crew. You'll probably get a two-star wanted level after this, so dash to the nearest vehicle and escape from the cops.