Grand Theft Auto IV Walkthrough

Now, head to Lorimar Street, which is fairly nearby Union Drive East. You may be confused when you arrive near the area shown as your destination on the HUD, however. Seek out scaffolding and building materials outside of this large building and begin climbing up it. Then, use the lift at the top of the scaffold to head up many floors to the building's roof. Once on the roof, cross the building and head into the yellow dot as seen on your HUD.

Now, it's time to make your decision. You received phone calls from both brothers, worrying about the upcoming situation. Francis thinks you'll definitely kill Derrick, while the latter insists you protect him from his corrupt cop brother. The decision you make is up to you, but there are certain things you need to keep in mind. First of all, saving Derrick isn't going to net you anything (likely because it's the choice you want to make). Saving Francis will allow you to call off the cops every so often if you're in trouble (a benefit likely given because it's the choice you don't want to make). There's also a difference in an upcoming funeral-based mission (but nothing more than location, really). Make the choice you want, and then get off of the roof and begin driving away from the location for the mission to end. If you want to know what choice we made, you only need to see one of the screens below. But yes, we killed the crooked cop.