[color:"yellow"]I believe you need Pick Pocket to complete the first test to get into the Thieves Guild [/color]
Not true; if you just kill the guy, the amulet will dump out along with the other stuff he has in his pockets(es). Just bite him and herd him away from the crowd, then polish him off (he's got like 20 hit points, so it won't take a lot of work).
I suppose that sort of approach would be better suited for an entry test into the assassin's guild, but meh, it gets the job done, right? <img src="/ubbthreads/images/graemlins/cool.gif" alt="" />
