Los Santos Customs Guide
You fully modded a vehicle
Before you start make a custom class and equipe “Active Camo”. Load up the Spartan Ops Episode 1 / Chapter 4. After you activate a terminal early in the mission your next objective will lead you outside. The Knight will spawn right at the exit. Crouch before the corner and activate the Active Camo. Move slowly and stay left or he might see you. He will turn around and you can assassinate him with a melee attack.