Mex

Mex is a slaver guarding the gate to The Pitt. He will take all the items in your inventory (except the "hidden weapon" you received from Werhner and the Worn Slave Outfit you took from the dead slave) and then tell you to enter Downtown. Your things will be returned to you after completing the Hole. All items taken are in a footlocker right behind Faydra.

Weapons
Mex also has an Infiltrator, the new silenced and scoped Assault Rifle featured in The Pitt (DLC). He is not the only NPC to wield this weapon, however, as his two guards as well as Gruber in The Hole also wield it.

Appearances
Mex appears in The Pitt DLC pack for Fallout 3.