Dusty McBride

Dusty McBride tends to his ranch of Brahmin in Novac in the Mojave Wasteland in 2281. He is the husband of Alice McBride. Dusty carries the unmarked quest Midnight Ranch Attacks. He informs the Courier about the his Brahmin being attacked at midnight every night. According to Dusty they are found with bullet holes in them. If you wait until midnight, you will see that it is a crazed Nightkin causing the attack. He appears in Fallout: New Vegas.

There's been a bug (Xbox 360) where the Nightkin doesn't attack the Brahmin and just stands the other side of the fence, watching. When you approach the Nightkin, he does nothing. You may stand as close as you want and no reaction will come from him. If you shoot him while he's still cloaked, you will be able to kill him (his dead body falls still cloaked), search him and gain XP from it but when you go back to Dusty McBride you only have the option to tell him that you haven't found anything.

There's a similar bug also on PC. However, the Nightkin appears already at daytime and remains there uncloaked. After you kill him, you're able to tell Dusty McBride that no one will kill his Brahmins. You finish the quest and gain fame with Novac.

You are able to use the Wait function to make it day time and he will still remain there. If you look at him, the word Nightkin will show with no health as if he is a friend (in the same colour as your HUD, rather than in red). You may also crouch and pickpocket him (despite not being given the option, you just crouch and press A) and he will Yell at you, but stay still, and you'll lose karma!