Smiling Jack

Smiling Jack is a character, that appears in the Bazaar side of Evergreen Mills. After you past numerous riders, you'll find him in one market-like corner. He'll usually not aggressive towards you, so you could trade with him. But he might steal some things from you, so pay attention. If you kill him, you will not lose karma, and you'll get the best combat shotgun in the game - The Terrible Shotgun, and a key to his Cabinet. There will be all the stuff he sells.