Location: This mission becomes available when you finish the secondary mission for Maude. You have to wait for an e-mail from her about the sought person and its location. Ralph Ostrowski is hiding in the quarry, at the highway, on the south-east from Trevor's trailer (marked place on screen above).
Ralph is at the very bottom of quarry and you can complete this mission in two different way. If you don't have anything against killing him, use a sniper rifle and eliminate Ralph from the safe distance or kill him while car chase.
The better idea is to capture Ralph alive, because there is a higher reward for that. make sure that you have a good car and approach Ralph so he begins an escape. During the chase, try to push out his car to make him stop somewhere. Quickly run to the Ralph's car and take him out of the car. If you chose this option, take Ostrowski to the Maude's house.
Reward for this mission:
- 10000 dollars (less if you killed Ralph)