Slin seems keen on more than just trade with the Hand of Trust. It would be best to investigate the Contraband Storage he apparently visited. Sergeant Brock might have the key to the warehouse.
Markers currently shown on the map (4)
Quest Steps - Find Brock and obtain the key (3)
Quest Starts - Slin's Trail
Journal
Brock was furious with Slin. They must have had quite the falling out. What exactly happened?