Gibson (Fallout 3)

The corpse of  can be found in the Capitol Post office building in L'Enfant. The key in his possession opens the model house in Gibson House, Minefield. In fact he is almost instantly killed by Radroaches when you first enter the building and it is possible to save him by running straight down and killing Radroaches attacking him. After that he will be your enemy and may be fleeing, or attacking you - he may even take grenades lying behind the rigged terminal and use them.

Location of model house
In Minefield enter the Gibson House, turn to your left and on the coffee table the model is in front of you.

Bugs
Note: When you first find his body (dead like it's supposed to be), he's headless. However between his legs you will see a head sticking up from the ground. This is not Gibson's real head, but only a Mutilated Torso, which only shows the head, and not the rest. The whole torso can be seen on PC if entering the TCL console command and fly "under" the floor.

When entering the building a second time after already finding the note, Gibson may spawn in the building alive and hostile. Killing him results in no karma loss, and looting his corpse reveals a second note and a finger, hinting that he is an evil character. This was only recently discovered minutes before this article was written. (Xbox 360 Confirmed; confirmed PS3; confirmed PC)

Appearances
's corpse appears in Fallout 3.

Behind the scenes
Gibson is a reference to Hideo Kojima's video game Snatcher. In Snatcher, there is also a Gibson's House, which also contains a small model home. Within the model are various clues.