This mission takes place before Los Sepulcros when Sweet mentioned that Carl and Smoke layed out a Balla named "lil weasel" I'm guessing that was a Beta mission and it got cut.

KNOWN BUGS: 1. The dialogues after CJ gets the sniper rifle may take a long time. 2. The wanted system MIGHT malfunction(ex. if you jack a car, you might get 2 stars instead of 1) 3. After when you drive back to Smoke's house, he'll in the car still when the cutscene pops, ending up to have 2 big smokes