The Ballad of Rocco is a GTA 5 Mission.

Rocco is messing with Solomon. Nobody messes with Solomon when Michael is around.

NOTE: If you are quick enough, you can use Michael's special ability to slow down time and use a sniper rifle to kill Rocco before he drives off the lot.?

This short Mission is straightforward. Chase Rocco. Force Rocco off the road. Kill Rocco.

Mission accomplished. Head home.