GTA 5 Mission Walkthrough: The Long Stretch
Lamar's involved in this mission, so you know something's bound to go wrong.
In this mission, you're tasked to go complete this drug deal, which just so happens to be with the guy you tied up in a van in the previous Mission, Chop.
Obviously he didn't take kindly to that, and you'll have to survive an onslaught of gang members trying to shoot you down.
Not only that, but you'll have to escape from the cops once you manage to finally get out of the building.