Rogue Courser

 is a quest in Fallout 4.

Quick walkthrough
Kill a Courser at (Random Location). Radiant Quest.

Detailed walkthrough
This only occurs when speaking to Preston and after you destroy the Institute during the Main Quest. You're pointed in the direction of (a random location), where a Courser has joined a Raider gang. Wipe out the tagged foe and (optionally) any other of his Raider friends. Then report back to Preston Garvey for more caps to add to your collection.

Journal entries
1. Kill The Courser 2. Talk to Preston Garvey