Cothron is the owner of Cothron's Armory, a small metalworking and repair shop in the northern end of Stonemarket Proper. He is only seen in the living quarters of his shop, typically sitting at his desk with a key on his belt. He is in possession of a unique item called the Orincross Dagger, which is part of a side quest that is started by listening to the meeting at Brent's Apartment in Stonemarket Plaza.
Brent is a merchant interested in acquiring the dagger and has hired a petty thief, pretending to be Garrett, to steal it from Cothron's Armory where it is currently being cleaned and sharpened. It was supposed to be placed in the donation box outside St. Edgar's Church, but the would-be burglar fails to locate it.
Contrary to Brent's statement, the dagger is not kept in the basement safe, but in a locked chest at the foot of Cothron's bed. As an added difficulty, Cothron himself is in the room.
If Garrett raids the armory without first hearing about the plan, the dagger will be a loot item worth 150g. Otherwise, it becomes a special item which can be exchanged for three gold coin stacks, daily (up to 2025g).