Lucas Simms

Lucas Simms is the sheriff and occasional mayor of Megaton, a town built around an unexploded nuclear bomb. He would like the bomb disarmed, despite the fact that it is worshiped by a local cult known as Children of the Atom. If you disarm the bomb, Simms will give you the keys to the Megaton Shack in Megaton. If Lucas Simms is dead his son Harden Simms will give you your reward.

If you inform Simms of Burke's plan to destroy Megaton, he will attempt to arrest Burke. This prompts Burke to try to kill Simms.Which depending on how you react during this confrontation can end up in his or Burke's death

He carries the key of Megaton Armory.

Quotes

 * "This is my town. So much as breathe wrong and I'll fucking inch you."
 * "I'll be damned, you're from that vault, Vault 101. *chuckles* I ain't seen one of those jumpsuits in a long time."

Appearances
Lucas Simms appears only in Fallout 3.

Related quests

 * The Power of the Atom

Known Bugs
Lucas Simms is one of the named Megaton residents who may mysteriously die and leave no body.
 * I had a variation of that bug: When confronting Burke, I managed to kill him (Burke) before he managed to shoot Simms. This caused Simms to disappear. I later found his dead corpse near the entrance for no particular reason.
 * Another issue: if you enter VATS as Lucas turns and Burke pulls his gun, and kill Burke before he shoots, Simms can still die. Simms' death appears to either be scripted to the end of the conversation, or Burke (almost always?) scores a Sneak Attack Critical on Simms.