Murphy (Fallout 3)

Murphy is a ghoul scientist living inside Northwest Seneca Station

Background
Murphy is developing a new, more potent form of Jet, a substance he has named "Ultrajet". He did so because normal jet is only having a limited effect on ghouls like him.

He has an assistant named Barrett, who acts primarily as a bodyguard, but can also be seen assisting Murphy with other tasks.

Interactions overview
1 Initially 0 caps, he will keep whatever amount of caps the Lone Wanderer leaves him with after their last transaction.

Appearances
Murphy appears

Bugs

 * Sometimes, it will take a few seconds for the game to register that the Lone Wanderer has given Murphy any or all of their Sugar Bombs. The player character will say "Here's all the Sugar Bombs I've got," but will not receive any caps nor will they be removed from their inventory. Trying this a few times, as well as waiting for up to 30 seconds before speaking to Murphy again, seems to get it to work.
 * Sometimes, if one has Fawkes in their party, Murphy will turn hostile towards him and Fawkes will attack Murphy.
 * If the ammo is pickpocketed from Murphy and then, in turn, his weapon as well, after 72 in-game hours, both the ammo and weapon will respawn inside his inventory. This bug, however, does not replace his inventory with his old one; thus if one reverse-pickpockets items into his inventory, they will not disappear.
 * It is very rare, but after killing Murphy, and then stealing something off of a shelf or from his area, he will be heard yelling "Stop, thief!", even though he is dead.