Dispose of merchant

Dispose of merchant is a side quest in Fallout. It is given by Decker to kill the merchant Daren Hightower and his wife for refusing to deal with the Underground.

Quick walkthrough

 * 1) Go to Decker on Lorenzo's advice.
 * 2) Accept the quest to kill Hightower.
 * 3) Trick the guard into giving you access.
 * 4) Kill Daren Hightower.

Detailed walkthrough
To receive this quest the Vault Dweller must first speak to Lorenzo at the Friendly Lending Company and ask him about Decker. Lorenzo will tell the Vault Dweller who to go to for work. The Vault Dweller then ought to tell Kane in the Maltese Falcon that they are looking for a job and mention Lorenzo's referral.

After accepting the quest the player's character can collect their $500 down-payment from Kane. Then they need to go to the southwest exit grid in Downtown of the Hub. This will take them to the Heights. The Hightowers live in the building in the middle of the section. The player's character should talk to the guard outside the door, and mention that they're running late for an appointment to get into the mansion.

Then it's a matter of just walk into the merchant's bedroom and opening fire. Both Daren and his wife need to die. Talking to Mr. Hightower will result in the Vault Dweller being kicked out, so just shooting the couple is preferable. In response, all 5 of the guards will come running, armed moderately well. Three have 10mm SMGs, one has a Desert Eagle, while Leon has a 14mm pistol. Decker demands eliminating any witnesses, so they need to go too.

Another way to get the quest done is to come at night, after 7PM, and promising to go away when the guard that hassles the player's character. Instead of leaving, the Vault Dweller should go round the house clockwise, and until just around  the corner so that the guard in front of the door sees them (Keep facing away until guard turns). When the guard passes around the corner, the player's character should run back to the door, open it, then close it once their companions are also inside, but before the guard returns. The player can now kill Hightower and his wife without the guards minding, as long as the player ends combat mode before they go, and they don't enter the guards' field of view (sight) on their way to the exit grid. There isn't any particular advantage for doing so, except if they just want to avoid bloodshed or are weak in combat.

The player can then head right on back to the Maltese Falcon and speak with Kane to get your reward. Hub Cops will not turn hostile.

Take down Decker
After getting this quest from Decker, the player can choose not to do it at any time and rat him out to the Hub Cops, Sheriff Justin Greene specifically. He'll request the player's help in raiding the Maltese Falcon and stamping out the Underground. The player can even do this after completing the quest and receiving their reward, as long as he succeeds a Charisma/Speech check.

Rewards

 * 500 XP
 * 2000 caps
 * Decker's next quest: Dispose of Jain