Picking Pockets
From CLOKwiki
This skill involves removing items from someone else's person without them knowing, employing stealth, sleight of hand, and the ability to appear innocent or involved.
Beware, getting caught stealing from citizens can get you in trouble, thrown in jail, or even kicked out of town.
Trainers
Currently there are no trainers outside of the Guild of Thieves... Wait did I say Guild of thieves? There's no Guild of Thieves. Shhhh... I was never here.