Having found the proper notes in Adam's house during "The Thrill of the Chase", Crane will be given this quest. Head to the rocky formation in the southwest of the map splitting the driver from the dam into two and climb to the top. Look for a large dead tree near the river and jump down to a platform. A cave is located along the northwestern side of the wall. Head inside and dispatch the Screamer inside. Open the nearby chest to find the Quickshooter and finish the quest.
