Location: This mission is available some time after finishing the secondary mission Maude: Glenn Scoville. You have to wait for an e-mail from Maude with information and location of the fourth sought person. Curtis Weaver is in the activist camp next to the highway in the northern part of the map (screen above).
Getting there isn't as easy as it seems to be. You have to find a small tunnel (screen above) net to the highway.
When you enter the activist camp, turn right and approach the old man. Hide behind a cover to avoid fire and then start running after this man. If Trevor developed Stamina, he should make it on his own. Otherwise, wait until you get nearby the highway or any other road and find some vehicle. When you catch Curtis, take him back to Maude's house.
Reward for this mission:
- 10000 dollars (less if you killed Curtis)