Find the missing people for Marcus

Find the missing people for Marcus is a side quest in Fallout 2.

Detailed walkthrough
To start this quest, talk to Marcus, the mutant town sheriff of Broken Hills. Ask him about things in town and offer your help on finding the missing people. You can refuse to take $ as a reward.

OPTIONAL: Next, locate a man named Dan in a house in the north-east corner of the Broken Hills residential area. He will tell you that his wife is missing; assure him that you will be able to find her.

Once you are in this side of town, find one of the manholes (there's one in an outhouse) and climb down in to the tunnels.

Once underground, you will have to face a few giant ants. Eventually, you will come across multiple dead bodies in the north east of this tunnel system. Find the body of a woman (more precisely, Dan's wife). There will be a note on her body.

The note implies that the mutant Francis is the killer of these missing people. The note also implicates Zaius.

OPTIONAL: Go back to Dan, and tell him you found his missing wife, dead in the tunnels below. You can also convince him to leave town, as he might as well be the next target of the killer.

OPTIONAL: While in this part of town, have a chat with Zaius in the mine foreman's hut. He will prompt you to talk to Francis.

OPTIONAL: Confront Francis with the note you found. You can either kill him or persuade him to leave the town, to atone for his sins.

After solving this mystery, go to Marcus to claim your reward. If you refused to take money earlier, he will give you a scoped hunting rifle.

Rewards

 * 500 XP
 * $500 or scoped hunting rifle
 * Dan's reward:
 * $500 (if asked for)
 * −10 karma and −10 reputation (if you refused to find Dan's wife)
 * 500 XP (if you informed Dan of his wife's murder) and
 * +5 Karma (if you consoled him)
 * −5 karma and −5 reputation (if you mocked him)
 * and −5 karma (if you laughed at him)
 * 1000 XP and +5 reputation (if you confronted Francis)