Carlos

Carlos is a homeless man sitting across the bridge from Rivet City.

Related quest: Water Beggars
He is asking for Purified Water. If the PC decides to give him purified water, they will gain +50 Karma. If you refuse to give Carlos any water, you will later find his dead body at the same location he was.

Glitches
If you find the bridge to Rivet City extended before you speak to the intercom and you scare Carlos to run across the bridge, then speak to the intrcom and the bridge will dissapear. Carlos will fall to his death or fall into the water. The bridge will continue to move across, and the PC can then go into Rivet City.

If you go to the highest tower of Rivet City and target him, he is sometimes not sitting but standing, well at the same level of sitting, so his legs are going through the ground. If you save your game while standing next to him, kill him, and load your game, he may appear to be lying the way you killed him but without any limb's missing, but if you talk to him he will return to sitting (confirmed on PS3).

Appearances
only appears in Fallout 3.